/**
 * Customized version of iScroll.js 0.1.1
 * It fixes bugs affecting its integration with fullpage.js
 * @license
 */
/*! iScroll v5.2.0 ~ (c) 2008-2016 Matteo Spinelli ~ http://cubiq.org/license */
(function (window, document, Math) {
    var rAF = window.requestAnimationFrame  ||
        window.webkitRequestAnimationFrame  ||
        window.mozRequestAnimationFrame     ||
        window.oRequestAnimationFrame       ||
        window.msRequestAnimationFrame      ||
        function (callback) { window.setTimeout(callback, 1000 / 60); };

    var utils = (function () {
        var me = {};

        var _elementStyle = document.createElement('div').style;
        var _vendor = (function () {
            var vendors = ['t', 'webkitT', 'MozT', 'msT', 'OT'],
                transform,
                i = 0,
                l = vendors.length;

            for ( ; i < l; i++ ) {
                transform = vendors[i] + 'ransform';
                if ( transform in _elementStyle ) return vendors[i].substr(0, vendors[i].length-1);
            }

            return false;
        })();

        function _prefixStyle (style) {
            if ( _vendor === false ) return false;
            if ( _vendor === '' ) return style;
            return _vendor + style.charAt(0).toUpperCase() + style.substr(1);
        }

        me.getTime = Date.now || function getTime () { return new Date().getTime(); };

        me.extend = function (target, obj) {
            for ( var i in obj ) {
                target[i] = obj[i];
            }
        };

        me.addEvent = function (el, type, fn, capture) {
            el.addEventListener(type, fn, !!capture);
        };

        me.removeEvent = function (el, type, fn, capture) {
            el.removeEventListener(type, fn, !!capture);
        };

        me.prefixPointerEvent = function (pointerEvent) {
            return window.MSPointerEvent ?
                'MSPointer' + pointerEvent.charAt(7).toUpperCase() + pointerEvent.substr(8):
                pointerEvent;
        };

        me.momentum = function (current, start, time, lowerMargin, wrapperSize, deceleration) {
            var distance = current - start,
                speed = Math.abs(distance) / time,
                destination,
                duration;

            deceleration = deceleration === undefined ? 0.0006 : deceleration;

            destination = current + ( speed * speed ) / ( 2 * deceleration ) * ( distance < 0 ? -1 : 1 );
            duration = speed / deceleration;

            if ( destination < lowerMargin ) {
                destination = wrapperSize ? lowerMargin - ( wrapperSize / 2.5 * ( speed / 8 ) ) : lowerMargin;
                distance = Math.abs(destination - current);
                duration = distance / speed;
            } else if ( destination > 0 ) {
                destination = wrapperSize ? wrapperSize / 2.5 * ( speed / 8 ) : 0;
                distance = Math.abs(current) + destination;
                duration = distance / speed;
            }

            return {
                destination: Math.round(destination),
                duration: duration
            };
        };

        var _transform = _prefixStyle('transform');

        me.extend(me, {
            hasTransform: _transform !== false,
            hasPerspective: _prefixStyle('perspective') in _elementStyle,
            hasTouch: 'ontouchstart' in window,
            hasPointer: !!(window.PointerEvent || window.MSPointerEvent), // IE10 is prefixed
            hasTransition: _prefixStyle('transition') in _elementStyle
        });

        /*
        This should find all Android browsers lower than build 535.19 (both stock browser and webview)
        - galaxy S2 is ok
        - 2.3.6 : `AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1`
        - 4.0.4 : `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S3 is badAndroid (stock brower, webview)
         `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S4 is badAndroid (stock brower, webview)
         `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S5 is OK
         `AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
       - galaxy S6 is OK
         `AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
      */
        me.isBadAndroid = (function() {
            var appVersion = window.navigator.appVersion;
            // Android browser is not a chrome browser.
            if (/Android/.test(appVersion) && !(/Chrome\/\d/.test(appVersion))) {
                var safariVersion = appVersion.match(/Safari\/(\d+.\d)/);
                if(safariVersion && typeof safariVersion === "object" && safariVersion.length >= 2) {
                    return parseFloat(safariVersion[1]) < 535.19;
                } else {
                    return true;
                }
            } else {
                return false;
            }
        })();

        me.extend(me.style = {}, {
            transform: _transform,
            transitionTimingFunction: _prefixStyle('transitionTimingFunction'),
            transitionDuration: _prefixStyle('transitionDuration'),
            transitionDelay: _prefixStyle('transitionDelay'),
            transformOrigin: _prefixStyle('transformOrigin')
        });

        me.hasClass = function (e, c) {
            var re = new RegExp("(^|\\s)" + c + "(\\s|$)");
            return re.test(e.className);
        };

        me.addClass = function (e, c) {
            if ( me.hasClass(e, c) ) {
                return;
            }

            var newclass = e.className.split(' ');
            newclass.push(c);
            e.className = newclass.join(' ');
        };

        me.removeClass = function (e, c) {
            if ( !me.hasClass(e, c) ) {
                return;
            }

            var re = new RegExp("(^|\\s)" + c + "(\\s|$)", 'g');
            e.className = e.className.replace(re, ' ');
        };

        me.offset = function (el) {
            var left = -el.offsetLeft,
                top = -el.offsetTop;

            // jshint -W084
            while (el = el.offsetParent) {
                left -= el.offsetLeft;
                top -= el.offsetTop;
            }
            // jshint +W084

            return {
                left: left,
                top: top
            };
        };

        me.preventDefaultException = function (el, exceptions) {
            for ( var i in exceptions ) {
                if ( exceptions[i].test(el[i]) ) {
                    return true;
                }
            }

            return false;
        };

        me.extend(me.eventType = {}, {
            touchstart: 1,
            touchmove: 1,
            touchend: 1,

            mousedown: 2,
            mousemove: 2,
            mouseup: 2,

            pointerdown: 3,
            pointermove: 3,
            pointerup: 3,

            MSPointerDown: 3,
            MSPointerMove: 3,
            MSPointerUp: 3
        });

        me.extend(me.ease = {}, {
            quadratic: {
                style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
                fn: function (k) {
                    return k * ( 2 - k );
                }
            },
            circular: {
                style: 'cubic-bezier(0.1, 0.57, 0.1, 1)',   // Not properly "circular" but this looks better, it should be (0.075, 0.82, 0.165, 1)
                fn: function (k) {
                    return Math.sqrt( 1 - ( --k * k ) );
                }
            },
            back: {
                style: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
                fn: function (k) {
                    var b = 4;
                    return ( k = k - 1 ) * k * ( ( b + 1 ) * k + b ) + 1;
                }
            },
            bounce: {
                style: '',
                fn: function (k) {
                    if ( ( k /= 1 ) < ( 1 / 2.75 ) ) {
                        return 7.5625 * k * k;
                    } else if ( k < ( 2 / 2.75 ) ) {
                        return 7.5625 * ( k -= ( 1.5 / 2.75 ) ) * k + 0.75;
                    } else if ( k < ( 2.5 / 2.75 ) ) {
                        return 7.5625 * ( k -= ( 2.25 / 2.75 ) ) * k + 0.9375;
                    } else {
                        return 7.5625 * ( k -= ( 2.625 / 2.75 ) ) * k + 0.984375;
                    }
                }
            },
            elastic: {
                style: '',
                fn: function (k) {
                    var f = 0.22,
                        e = 0.4;

                    if ( k === 0 ) { return 0; }
                    if ( k == 1 ) { return 1; }

                    return ( e * Math.pow( 2, - 10 * k ) * Math.sin( ( k - f / 4 ) * ( 2 * Math.PI ) / f ) + 1 );
                }
            }
        });

        me.tap = function (e, eventName) {
            var ev = document.createEvent('Event');
            ev.initEvent(eventName, true, true);
            ev.pageX = e.pageX;
            ev.pageY = e.pageY;
            e.target.dispatchEvent(ev);
        };

        me.click = function (e) {
            var target = e.target,
                ev;

            if ( !(/(SELECT|INPUT|TEXTAREA)/i).test(target.tagName) ) {
                // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/initMouseEvent
                // initMouseEvent is deprecated.
                ev = document.createEvent(window.MouseEvent ? 'MouseEvents' : 'Event');
                ev.initEvent('click', true, true);
                ev.view = e.view || window;
                ev.detail = 1;
                ev.screenX = target.screenX || 0;
                ev.screenY = target.screenY || 0;
                ev.clientX = target.clientX || 0;
                ev.clientY = target.clientY || 0;
                ev.ctrlKey = !!e.ctrlKey;
                ev.altKey = !!e.altKey;
                ev.shiftKey = !!e.shiftKey;
                ev.metaKey = !!e.metaKey;
                ev.button = 0;
                ev.relatedTarget = null;
                ev._constructed = true;
                target.dispatchEvent(ev);
            }
        };

        return me;
    })();
    function IScroll (el, options) {
        this.wrapper = typeof el == 'string' ? document.querySelector(el) : el;
        this.scroller = this.wrapper.children[0];
        this.scrollerStyle = this.scroller.style;       // cache style for better performance

        this.options = {

            resizeScrollbars: true,

            mouseWheelSpeed: 20,

            snapThreshold: 0.334,

// INSERT POINT: OPTIONS
            disablePointer : !utils.hasPointer,
            disableTouch : utils.hasPointer || !utils.hasTouch,
            disableMouse : utils.hasPointer || utils.hasTouch,
            startX: 0,
            startY: 0,
            scrollY: true,
            directionLockThreshold: 5,
            momentum: true,

            bounce: true,
            bounceTime: 600,
            bounceEasing: '',

            preventDefault: true,
            preventDefaultException: { tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT|LABEL)$/ },

            HWCompositing: true,
            useTransition: true,
            useTransform: true,
            bindToWrapper: typeof window.onmousedown === "undefined"
        };

        for ( var i in options ) {
            this.options[i] = options[i];
        }

        // Normalize options
        this.translateZ = this.options.HWCompositing && utils.hasPerspective ? ' translateZ(0)' : '';

        this.options.useTransition = utils.hasTransition && this.options.useTransition;
        this.options.useTransform = utils.hasTransform && this.options.useTransform;

        this.options.eventPassthrough = this.options.eventPassthrough === true ? 'vertical' : this.options.eventPassthrough;
        this.options.preventDefault = !this.options.eventPassthrough && this.options.preventDefault;

        // If you want eventPassthrough I have to lock one of the axes
        this.options.scrollY = this.options.eventPassthrough == 'vertical' ? false : this.options.scrollY;
        this.options.scrollX = this.options.eventPassthrough == 'horizontal' ? false : this.options.scrollX;

        // With eventPassthrough we also need lockDirection mechanism
        this.options.freeScroll = this.options.freeScroll && !this.options.eventPassthrough;
        this.options.directionLockThreshold = this.options.eventPassthrough ? 0 : this.options.directionLockThreshold;

        this.options.bounceEasing = typeof this.options.bounceEasing == 'string' ? utils.ease[this.options.bounceEasing] || utils.ease.circular : this.options.bounceEasing;

        this.options.resizePolling = this.options.resizePolling === undefined ? 60 : this.options.resizePolling;

        if ( this.options.tap === true ) {
            this.options.tap = 'tap';
        }

        // https://github.com/cubiq/iscroll/issues/1029
        if (!this.options.useTransition && !this.options.useTransform) {
            if(!(/relative|absolute/i).test(this.scrollerStyle.position)) {
                this.scrollerStyle.position = "relative";
            }
        }

        if ( this.options.shrinkScrollbars == 'scale' ) {
            this.options.useTransition = false;
        }

        this.options.invertWheelDirection = this.options.invertWheelDirection ? -1 : 1;

// INSERT POINT: NORMALIZATION

        // Some defaults
        this.x = 0;
        this.y = 0;
        this.directionX = 0;
        this.directionY = 0;
        this._events = {};

// INSERT POINT: DEFAULTS

        this._init();
        this.refresh();

        this.scrollTo(this.options.startX, this.options.startY);
        this.enable();
    }

    IScroll.prototype = {
        version: '5.2.0',

        _init: function () {
            this._initEvents();

            if ( this.options.scrollbars || this.options.indicators ) {
                this._initIndicators();
            }

            if ( this.options.mouseWheel ) {
                this._initWheel();
            }

            if ( this.options.snap ) {
                this._initSnap();
            }

            if ( this.options.keyBindings ) {
                this._initKeys();
            }

// INSERT POINT: _init

        },

        destroy: function () {
            this._initEvents(true);
            clearTimeout(this.resizeTimeout);
            this.resizeTimeout = null;
            this._execEvent('destroy');
        },

        _transitionEnd: function (e) {
            if ( e.target != this.scroller || !this.isInTransition ) {
                return;
            }

            this._transitionTime();
            if ( !this.resetPosition(this.options.bounceTime) ) {
                this.isInTransition = false;
                this._execEvent('scrollEnd');
            }
        },

        _start: function (e) {
            // React to left mouse button only
            if ( utils.eventType[e.type] != 1 ) {
                // for button property
                // http://unixpapa.com/js/mouse.html
                var button;
                if (!e.which) {
                    /* IE case */
                    button = (e.button < 2) ? 0 :
                        ((e.button == 4) ? 1 : 2);
                } else {
                    /* All others */
                    button = e.button;
                }
                if ( button !== 0 ) {
                    return;
                }
            }

            if ( !this.enabled || (this.initiated && utils.eventType[e.type] !== this.initiated) ) {
                return;
            }

            if ( this.options.preventDefault && !utils.isBadAndroid && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
                e.preventDefault();
            }

            var point = e.touches ? e.touches[0] : e,
                pos;

            this.initiated  = utils.eventType[e.type];
            this.moved      = false;
            this.distX      = 0;
            this.distY      = 0;
            this.directionX = 0;
            this.directionY = 0;
            this.directionLocked = 0;

            this.startTime = utils.getTime();

            if ( this.options.useTransition && this.isInTransition ) {
                this._transitionTime();
                this.isInTransition = false;
                pos = this.getComputedPosition();
                this._translate(Math.round(pos.x), Math.round(pos.y));
                this._execEvent('scrollEnd');
            } else if ( !this.options.useTransition && this.isAnimating ) {
                this.isAnimating = false;
                this._execEvent('scrollEnd');
            }

            this.startX    = this.x;
            this.startY    = this.y;
            this.absStartX = this.x;
            this.absStartY = this.y;
            this.pointX    = point.pageX;
            this.pointY    = point.pageY;

            this._execEvent('beforeScrollStart');
        },

        _move: function (e) {
            if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
                return;
            }

            if ( this.options.preventDefault ) {    // increases performance on Android? TODO: check!
                e.preventDefault();
            }

            var point       = e.touches ? e.touches[0] : e,
                deltaX      = point.pageX - this.pointX,
                deltaY      = point.pageY - this.pointY,
                timestamp   = utils.getTime(),
                newX, newY,
                absDistX, absDistY;

            this.pointX     = point.pageX;
            this.pointY     = point.pageY;

            this.distX      += deltaX;
            this.distY      += deltaY;
            absDistX        = Math.abs(this.distX);
            absDistY        = Math.abs(this.distY);

            // We need to move at least 10 pixels for the scrolling to initiate
            if ( timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10) ) {
                return;
            }

            // If you are scrolling in one direction lock the other
            if ( !this.directionLocked && !this.options.freeScroll ) {
                if ( absDistX > absDistY + this.options.directionLockThreshold ) {
                    this.directionLocked = 'h';     // lock horizontally
                } else if ( absDistY >= absDistX + this.options.directionLockThreshold ) {
                    this.directionLocked = 'v';     // lock vertically
                } else {
                    this.directionLocked = 'n';     // no lock
                }
            }

            if ( this.directionLocked == 'h' ) {
                if ( this.options.eventPassthrough == 'vertical' ) {
                    e.preventDefault();
                } else if ( this.options.eventPassthrough == 'horizontal' ) {
                    this.initiated = false;
                    return;
                }

                deltaY = 0;
            } else if ( this.directionLocked == 'v' ) {
                if ( this.options.eventPassthrough == 'horizontal' ) {
                    e.preventDefault();
                } else if ( this.options.eventPassthrough == 'vertical' ) {
                    this.initiated = false;
                    return;
                }

                deltaX = 0;
            }

            deltaX = this.hasHorizontalScroll ? deltaX : 0;
            deltaY = this.hasVerticalScroll ? deltaY : 0;

            newX = this.x + deltaX;
            newY = this.y + deltaY;

            // Slow down if outside of the boundaries
            if ( newX > 0 || newX < this.maxScrollX ) {
                newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
            }
            if ( newY > 0 || newY < this.maxScrollY ) {
                newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
            }

            this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
            this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;

            if ( !this.moved ) {
                this._execEvent('scrollStart');
            }

            this.moved = true;

            this._translate(newX, newY);

            /* REPLACE START: _move */

            if ( timestamp - this.startTime > 300 ) {
                this.startTime = timestamp;
                this.startX = this.x;
                this.startY = this.y;
            }

            /* REPLACE END: _move */

        },

        _end: function (e) {
            if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
                return;
            }

            if ( this.options.preventDefault && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
                e.preventDefault();
            }

            var point = e.changedTouches ? e.changedTouches[0] : e,
                momentumX,
                momentumY,
                duration = utils.getTime() - this.startTime,
                newX = Math.round(this.x),
                newY = Math.round(this.y),
                distanceX = Math.abs(newX - this.startX),
                distanceY = Math.abs(newY - this.startY),
                time = 0,
                easing = '';

            this.isInTransition = 0;
            this.initiated = 0;
            this.endTime = utils.getTime();

            // reset if we are outside of the boundaries
            if ( this.resetPosition(this.options.bounceTime) ) {
                return;
            }

            this.scrollTo(newX, newY);  // ensures that the last position is rounded

            // we scrolled less than 10 pixels
            if ( !this.moved ) {
                if ( this.options.tap ) {
                    utils.tap(e, this.options.tap);
                }

                if ( this.options.click ) {
                    utils.click(e);
                }

                this._execEvent('scrollCancel');
                return;
            }

            if ( this._events.flick && duration < 200 && distanceX < 100 && distanceY < 100 ) {
                this._execEvent('flick');
                return;
            }

            // start momentum animation if needed
            if ( this.options.momentum && duration < 300 ) {
                momentumX = this.hasHorizontalScroll ? utils.momentum(this.x, this.startX, duration, this.maxScrollX, this.options.bounce ? this.wrapperWidth : 0, this.options.deceleration) : { destination: newX, duration: 0 };
                momentumY = this.hasVerticalScroll ? utils.momentum(this.y, this.startY, duration, this.maxScrollY, this.options.bounce ? this.wrapperHeight : 0, this.options.deceleration) : { destination: newY, duration: 0 };
                newX = momentumX.destination;
                newY = momentumY.destination;
                time = Math.max(momentumX.duration, momentumY.duration);
                this.isInTransition = 1;
            }


            if ( this.options.snap ) {
                var snap = this._nearestSnap(newX, newY);
                this.currentPage = snap;
                time = this.options.snapSpeed || Math.max(
                    Math.max(
                        Math.min(Math.abs(newX - snap.x), 1000),
                        Math.min(Math.abs(newY - snap.y), 1000)
                    ), 300);
                newX = snap.x;
                newY = snap.y;

                this.directionX = 0;
                this.directionY = 0;
                easing = this.options.bounceEasing;
            }

// INSERT POINT: _end

            if ( newX != this.x || newY != this.y ) {
                // change easing function when scroller goes out of the boundaries
                if ( newX > 0 || newX < this.maxScrollX || newY > 0 || newY < this.maxScrollY ) {
                    easing = utils.ease.quadratic;
                }

                this.scrollTo(newX, newY, time, easing);
                return;
            }

            this._execEvent('scrollEnd');
        },

        _resize: function () {
            var that = this;

            clearTimeout(this.resizeTimeout);

            this.resizeTimeout = setTimeout(function () {
                that.refresh();
            }, this.options.resizePolling);
        },

        resetPosition: function (time) {
            var x = this.x,
                y = this.y;

            time = time || 0;

            if ( !this.hasHorizontalScroll || this.x > 0 ) {
                x = 0;
            } else if ( this.x < this.maxScrollX ) {
                x = this.maxScrollX;
            }

            if ( !this.hasVerticalScroll || this.y > 0 ) {
                y = 0;
            } else if ( this.y < this.maxScrollY ) {
                y = this.maxScrollY;
            }

            if ( x == this.x && y == this.y ) {
                return false;
            }

            this.scrollTo(x, y, time, this.options.bounceEasing);

            return true;
        },

        disable: function () {
            this.enabled = false;
        },

        enable: function () {
            this.enabled = true;
        },

        refresh: function () {
            var rf = this.wrapper.offsetHeight;     // Force reflow

            this.wrapperWidth   = this.wrapper.clientWidth;
            this.wrapperHeight  = this.wrapper.clientHeight;

            /* REPLACE START: refresh */

            this.scrollerWidth  = this.scroller.offsetWidth;
            this.scrollerHeight = this.scroller.offsetHeight;

            this.maxScrollX     = this.wrapperWidth - this.scrollerWidth;
            this.maxScrollY     = this.wrapperHeight - this.scrollerHeight;

            /* REPLACE END: refresh */

            this.hasHorizontalScroll    = this.options.scrollX && this.maxScrollX < 0;
            this.hasVerticalScroll      = this.options.scrollY && this.maxScrollY < 0;

            if ( !this.hasHorizontalScroll ) {
                this.maxScrollX = 0;
                this.scrollerWidth = this.wrapperWidth;
            }

            if ( !this.hasVerticalScroll ) {
                this.maxScrollY = 0;
                this.scrollerHeight = this.wrapperHeight;
            }

            this.endTime = 0;
            this.directionX = 0;
            this.directionY = 0;

            this.wrapperOffset = utils.offset(this.wrapper);

            this._execEvent('refresh');

            this.resetPosition();

// INSERT POINT: _refresh

        },

        on: function (type, fn) {
            if ( !this._events[type] ) {
                this._events[type] = [];
            }

            this._events[type].push(fn);
        },

        off: function (type, fn) {
            if ( !this._events[type] ) {
                return;
            }

            var index = this._events[type].indexOf(fn);

            if ( index > -1 ) {
                this._events[type].splice(index, 1);
            }
        },

        _execEvent: function (type) {
            if ( !this._events[type] ) {
                return;
            }

            var i = 0,
                l = this._events[type].length;

            if ( !l ) {
                return;
            }

            for ( ; i < l; i++ ) {
                this._events[type][i].apply(this, [].slice.call(arguments, 1));
            }
        },

        scrollBy: function (x, y, time, easing) {
            x = this.x + x;
            y = this.y + y;
            time = time || 0;

            this.scrollTo(x, y, time, easing);
        },

        scrollTo: function (x, y, time, easing) {
            easing = easing || utils.ease.circular;

            this.isInTransition = this.options.useTransition && time > 0;
            var transitionType = this.options.useTransition && easing.style;
            if ( !time || transitionType ) {
                if(transitionType) {
                    this._transitionTimingFunction(easing.style);
                    this._transitionTime(time);
                }
                this._translate(x, y);
            } else {
                this._animate(x, y, time, easing.fn);
            }
        },

        scrollToElement: function (el, time, offsetX, offsetY, easing) {
            el = el.nodeType ? el : this.scroller.querySelector(el);

            if ( !el ) {
                return;
            }

            var pos = utils.offset(el);

            pos.left -= this.wrapperOffset.left;
            pos.top  -= this.wrapperOffset.top;

            // if offsetX/Y are true we center the element to the screen
            if ( offsetX === true ) {
                offsetX = Math.round(el.offsetWidth / 2 - this.wrapper.offsetWidth / 2);
            }
            if ( offsetY === true ) {
                offsetY = Math.round(el.offsetHeight / 2 - this.wrapper.offsetHeight / 2);
            }

            pos.left -= offsetX || 0;
            pos.top  -= offsetY || 0;

            pos.left = pos.left > 0 ? 0 : pos.left < this.maxScrollX ? this.maxScrollX : pos.left;
            pos.top  = pos.top  > 0 ? 0 : pos.top  < this.maxScrollY ? this.maxScrollY : pos.top;

            time = time === undefined || time === null || time === 'auto' ? Math.max(Math.abs(this.x-pos.left), Math.abs(this.y-pos.top)) : time;

            this.scrollTo(pos.left, pos.top, time, easing);
        },

        _transitionTime: function (time) {
            if (!this.options.useTransition) {
                return;
            }
            time = time || 0;
            var durationProp = utils.style.transitionDuration;
            if(!durationProp) {
                return;
            }

            this.scrollerStyle[durationProp] = time + 'ms';

            if ( !time && utils.isBadAndroid ) {
                this.scrollerStyle[durationProp] = '0.0001ms';
                // remove 0.0001ms
                var self = this;
                rAF(function() {
                    if(self.scrollerStyle[durationProp] === '0.0001ms') {
                        self.scrollerStyle[durationProp] = '0s';
                    }
                });
            }


            if ( this.indicators ) {
                for ( var i = this.indicators.length; i--; ) {
                    this.indicators[i].transitionTime(time);
                }
            }


// INSERT POINT: _transitionTime

        },

        _transitionTimingFunction: function (easing) {
            this.scrollerStyle[utils.style.transitionTimingFunction] = easing;


            if ( this.indicators ) {
                for ( var i = this.indicators.length; i--; ) {
                    this.indicators[i].transitionTimingFunction(easing);
                }
            }


// INSERT POINT: _transitionTimingFunction

        },

        _translate: function (x, y) {
            if ( this.options.useTransform ) {

                /* REPLACE START: _translate */

                this.scrollerStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.translateZ;

                /* REPLACE END: _translate */

            } else {
                x = Math.round(x);
                y = Math.round(y);
                this.scrollerStyle.left = x + 'px';
                this.scrollerStyle.top = y + 'px';
            }

            this.x = x;
            this.y = y;


            if ( this.indicators ) {
                for ( var i = this.indicators.length; i--; ) {
                    this.indicators[i].updatePosition();
                }
            }


// INSERT POINT: _translate

        },

        _initEvents: function (remove) {
            var eventType = remove ? utils.removeEvent : utils.addEvent,
                target = this.options.bindToWrapper ? this.wrapper : window;

            eventType(window, 'orientationchange', this);
            eventType(window, 'resize', this);

            if ( this.options.click ) {
                eventType(this.wrapper, 'click', this, true);
            }

            if ( !this.options.disableMouse ) {
                eventType(this.wrapper, 'mousedown', this);
                eventType(target, 'mousemove', this);
                eventType(target, 'mousecancel', this);
                eventType(target, 'mouseup', this);
            }

            if ( utils.hasPointer && !this.options.disablePointer ) {
                eventType(this.wrapper, utils.prefixPointerEvent('pointerdown'), this);
                eventType(target, utils.prefixPointerEvent('pointermove'), this);
                eventType(target, utils.prefixPointerEvent('pointercancel'), this);
                eventType(target, utils.prefixPointerEvent('pointerup'), this);
            }

            if ( utils.hasTouch && !this.options.disableTouch ) {
                eventType(this.wrapper, 'touchstart', this);
                eventType(target, 'touchmove', this);
                eventType(target, 'touchcancel', this);
                eventType(target, 'touchend', this);
            }

            eventType(this.scroller, 'transitionend', this);
            eventType(this.scroller, 'webkitTransitionEnd', this);
            eventType(this.scroller, 'oTransitionEnd', this);
            eventType(this.scroller, 'MSTransitionEnd', this);
        },

        getComputedPosition: function () {
            var matrix = window.getComputedStyle(this.scroller, null),
                x, y;

            if ( this.options.useTransform ) {
                matrix = matrix[utils.style.transform].split(')')[0].split(', ');
                x = +(matrix[12] || matrix[4]);
                y = +(matrix[13] || matrix[5]);
            } else {
                x = +matrix.left.replace(/[^-\d.]/g, '');
                y = +matrix.top.replace(/[^-\d.]/g, '');
            }

            return { x: x, y: y };
        },
        _initIndicators: function () {
            var interactive = this.options.interactiveScrollbars,
                customStyle = typeof this.options.scrollbars != 'string',
                indicators = [],
                indicator;

            var that = this;

            this.indicators = [];

            if ( this.options.scrollbars ) {
                // Vertical scrollbar
                if ( this.options.scrollY ) {
                    indicator = {
                        el: createDefaultScrollbar('v', interactive, this.options.scrollbars),
                        interactive: interactive,
                        defaultScrollbars: true,
                        customStyle: customStyle,
                        resize: this.options.resizeScrollbars,
                        shrink: this.options.shrinkScrollbars,
                        fade: this.options.fadeScrollbars,
                        listenX: false
                    };

                    this.wrapper.appendChild(indicator.el);
                    indicators.push(indicator);
                }

                // Horizontal scrollbar
                if ( this.options.scrollX ) {
                    indicator = {
                        el: createDefaultScrollbar('h', interactive, this.options.scrollbars),
                        interactive: interactive,
                        defaultScrollbars: true,
                        customStyle: customStyle,
                        resize: this.options.resizeScrollbars,
                        shrink: this.options.shrinkScrollbars,
                        fade: this.options.fadeScrollbars,
                        listenY: false
                    };

                    this.wrapper.appendChild(indicator.el);
                    indicators.push(indicator);
                }
            }

            if ( this.options.indicators ) {
                // TODO: check concat compatibility
                indicators = indicators.concat(this.options.indicators);
            }

            for ( var i = indicators.length; i--; ) {
                this.indicators.push( new Indicator(this, indicators[i]) );
            }

            // TODO: check if we can use array.map (wide compatibility and performance issues)
            function _indicatorsMap (fn) {
                if (that.indicators) {
                    for ( var i = that.indicators.length; i--; ) {
                        fn.call(that.indicators[i]);
                    }
                }
            }

            if ( this.options.fadeScrollbars ) {
                this.on('scrollEnd', function () {
                    _indicatorsMap(function () {
                        this.fade();
                    });
                });

                this.on('scrollCancel', function () {
                    _indicatorsMap(function () {
                        this.fade();
                    });
                });

                this.on('scrollStart', function () {
                    _indicatorsMap(function () {
                        this.fade(1);
                    });
                });

                this.on('beforeScrollStart', function () {
                    _indicatorsMap(function () {
                        this.fade(1, true);
                    });
                });
            }


            this.on('refresh', function () {
                _indicatorsMap(function () {
                    this.refresh();
                });
            });

            this.on('destroy', function () {
                _indicatorsMap(function () {
                    this.destroy();
                });

                delete this.indicators;
            });
        },

        _initWheel: function () {
            utils.addEvent(this.wrapper, 'wheel', this);
            utils.addEvent(this.wrapper, 'mousewheel', this);
            utils.addEvent(this.wrapper, 'DOMMouseScroll', this);

            this.on('destroy', function () {
                clearTimeout(this.wheelTimeout);
                this.wheelTimeout = null;
                utils.removeEvent(this.wrapper, 'wheel', this);
                utils.removeEvent(this.wrapper, 'mousewheel', this);
                utils.removeEvent(this.wrapper, 'DOMMouseScroll', this);
            });
        },

        _wheel: function (e) {
            if ( !this.enabled ) {
                return;
            }

            var wheelDeltaX, wheelDeltaY,
                newX, newY,
                that = this;

            if ( this.wheelTimeout === undefined ) {
                that._execEvent('scrollStart');
            }

            // Execute the scrollEnd event after 400ms the wheel stopped scrolling
            clearTimeout(this.wheelTimeout);
            this.wheelTimeout = setTimeout(function () {
                if(!that.options.snap) {
                    that._execEvent('scrollEnd');
                }
                that.wheelTimeout = undefined;
            }, 400);

            if ( 'deltaX' in e ) {
                if (e.deltaMode === 1) {
                    wheelDeltaX = -e.deltaX * this.options.mouseWheelSpeed;
                    wheelDeltaY = -e.deltaY * this.options.mouseWheelSpeed;
                } else {
                    wheelDeltaX = -e.deltaX;
                    wheelDeltaY = -e.deltaY;
                }
            } else if ( 'wheelDeltaX' in e ) {
                wheelDeltaX = e.wheelDeltaX / 120 * this.options.mouseWheelSpeed;
                wheelDeltaY = e.wheelDeltaY / 120 * this.options.mouseWheelSpeed;
            } else if ( 'wheelDelta' in e ) {
                wheelDeltaX = wheelDeltaY = e.wheelDelta / 120 * this.options.mouseWheelSpeed;
            } else if ( 'detail' in e ) {
                wheelDeltaX = wheelDeltaY = -e.detail / 3 * this.options.mouseWheelSpeed;
            } else {
                return;
            }

            wheelDeltaX *= this.options.invertWheelDirection;
            wheelDeltaY *= this.options.invertWheelDirection;

            if ( !this.hasVerticalScroll ) {
                wheelDeltaX = wheelDeltaY;
                wheelDeltaY = 0;
            }

            if ( this.options.snap ) {
                newX = this.currentPage.pageX;
                newY = this.currentPage.pageY;

                if ( wheelDeltaX > 0 ) {
                    newX--;
                } else if ( wheelDeltaX < 0 ) {
                    newX++;
                }

                if ( wheelDeltaY > 0 ) {
                    newY--;
                } else if ( wheelDeltaY < 0 ) {
                    newY++;
                }

                this.goToPage(newX, newY);

                return;
            }

            newX = this.x + Math.round(this.hasHorizontalScroll ? wheelDeltaX : 0);
            newY = this.y + Math.round(this.hasVerticalScroll ? wheelDeltaY : 0);

            this.directionX = wheelDeltaX > 0 ? -1 : wheelDeltaX < 0 ? 1 : 0;
            this.directionY = wheelDeltaY > 0 ? -1 : wheelDeltaY < 0 ? 1 : 0;

            if ( newX > 0 ) {
                newX = 0;
            } else if ( newX < this.maxScrollX ) {
                newX = this.maxScrollX;
            }

            if ( newY > 0 ) {
                newY = 0;
            } else if ( newY < this.maxScrollY ) {
                newY = this.maxScrollY;
            }

            this.scrollTo(newX, newY, 0);

// INSERT POINT: _wheel
        },

        _initSnap: function () {
            this.currentPage = {};

            if ( typeof this.options.snap == 'string' ) {
                this.options.snap = this.scroller.querySelectorAll(this.options.snap);
            }

            this.on('refresh', function () {
                var i = 0, l,
                    m = 0, n,
                    cx, cy,
                    x = 0, y,
                    stepX = this.options.snapStepX || this.wrapperWidth,
                    stepY = this.options.snapStepY || this.wrapperHeight,
                    el;

                this.pages = [];

                if ( !this.wrapperWidth || !this.wrapperHeight || !this.scrollerWidth || !this.scrollerHeight ) {
                    return;
                }

                if ( this.options.snap === true ) {
                    cx = Math.round( stepX / 2 );
                    cy = Math.round( stepY / 2 );

                    while ( x > -this.scrollerWidth ) {
                        this.pages[i] = [];
                        l = 0;
                        y = 0;

                        while ( y > -this.scrollerHeight ) {
                            this.pages[i][l] = {
                                x: Math.max(x, this.maxScrollX),
                                y: Math.max(y, this.maxScrollY),
                                width: stepX,
                                height: stepY,
                                cx: x - cx,
                                cy: y - cy
                            };

                            y -= stepY;
                            l++;
                        }

                        x -= stepX;
                        i++;
                    }
                } else {
                    el = this.options.snap;
                    l = el.length;
                    n = -1;

                    for ( ; i < l; i++ ) {
                        if ( i === 0 || el[i].offsetLeft <= el[i-1].offsetLeft ) {
                            m = 0;
                            n++;
                        }

                        if ( !this.pages[m] ) {
                            this.pages[m] = [];
                        }

                        x = Math.max(-el[i].offsetLeft, this.maxScrollX);
                        y = Math.max(-el[i].offsetTop, this.maxScrollY);
                        cx = x - Math.round(el[i].offsetWidth / 2);
                        cy = y - Math.round(el[i].offsetHeight / 2);

                        this.pages[m][n] = {
                            x: x,
                            y: y,
                            width: el[i].offsetWidth,
                            height: el[i].offsetHeight,
                            cx: cx,
                            cy: cy
                        };

                        if ( x > this.maxScrollX ) {
                            m++;
                        }
                    }
                }

                this.goToPage(this.currentPage.pageX || 0, this.currentPage.pageY || 0, 0);

                // Update snap threshold if needed
                if ( this.options.snapThreshold % 1 === 0 ) {
                    this.snapThresholdX = this.options.snapThreshold;
                    this.snapThresholdY = this.options.snapThreshold;
                } else {
                    this.snapThresholdX = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].width * this.options.snapThreshold);
                    this.snapThresholdY = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].height * this.options.snapThreshold);
                }
            });

            this.on('flick', function () {
                var time = this.options.snapSpeed || Math.max(
                    Math.max(
                        Math.min(Math.abs(this.x - this.startX), 1000),
                        Math.min(Math.abs(this.y - this.startY), 1000)
                    ), 300);

                this.goToPage(
                    this.currentPage.pageX + this.directionX,
                    this.currentPage.pageY + this.directionY,
                    time
                );
            });
        },

        _nearestSnap: function (x, y) {
            if ( !this.pages.length ) {
                return { x: 0, y: 0, pageX: 0, pageY: 0 };
            }

            var i = 0,
                l = this.pages.length,
                m = 0;

            // Check if we exceeded the snap threshold
            if ( Math.abs(x - this.absStartX) < this.snapThresholdX &&
                Math.abs(y - this.absStartY) < this.snapThresholdY ) {
                return this.currentPage;
            }

            if ( x > 0 ) {
                x = 0;
            } else if ( x < this.maxScrollX ) {
                x = this.maxScrollX;
            }

            if ( y > 0 ) {
                y = 0;
            } else if ( y < this.maxScrollY ) {
                y = this.maxScrollY;
            }

            for ( ; i < l; i++ ) {
                if ( x >= this.pages[i][0].cx ) {
                    x = this.pages[i][0].x;
                    break;
                }
            }

            l = this.pages[i].length;

            for ( ; m < l; m++ ) {
                if ( y >= this.pages[0][m].cy ) {
                    y = this.pages[0][m].y;
                    break;
                }
            }

            if ( i == this.currentPage.pageX ) {
                i += this.directionX;

                if ( i < 0 ) {
                    i = 0;
                } else if ( i >= this.pages.length ) {
                    i = this.pages.length - 1;
                }

                x = this.pages[i][0].x;
            }

            if ( m == this.currentPage.pageY ) {
                m += this.directionY;

                if ( m < 0 ) {
                    m = 0;
                } else if ( m >= this.pages[0].length ) {
                    m = this.pages[0].length - 1;
                }

                y = this.pages[0][m].y;
            }

            return {
                x: x,
                y: y,
                pageX: i,
                pageY: m
            };
        },

        goToPage: function (x, y, time, easing) {
            easing = easing || this.options.bounceEasing;

            if ( x >= this.pages.length ) {
                x = this.pages.length - 1;
            } else if ( x < 0 ) {
                x = 0;
            }

            if ( y >= this.pages[x].length ) {
                y = this.pages[x].length - 1;
            } else if ( y < 0 ) {
                y = 0;
            }

            var posX = this.pages[x][y].x,
                posY = this.pages[x][y].y;

            time = time === undefined ? this.options.snapSpeed || Math.max(
                Math.max(
                    Math.min(Math.abs(posX - this.x), 1000),
                    Math.min(Math.abs(posY - this.y), 1000)
                ), 300) : time;

            this.currentPage = {
                x: posX,
                y: posY,
                pageX: x,
                pageY: y
            };

            this.scrollTo(posX, posY, time, easing);
        },

        next: function (time, easing) {
            var x = this.currentPage.pageX,
                y = this.currentPage.pageY;

            x++;

            if ( x >= this.pages.length && this.hasVerticalScroll ) {
                x = 0;
                y++;
            }

            this.goToPage(x, y, time, easing);
        },

        prev: function (time, easing) {
            var x = this.currentPage.pageX,
                y = this.currentPage.pageY;

            x--;

            if ( x < 0 && this.hasVerticalScroll ) {
                x = 0;
                y--;
            }

            this.goToPage(x, y, time, easing);
        },

        _initKeys: function (e) {
            // default key bindings
            var keys = {
                pageUp: 33,
                pageDown: 34,
                end: 35,
                home: 36,
                left: 37,
                up: 38,
                right: 39,
                down: 40
            };
            var i;

            // if you give me characters I give you keycode
            if ( typeof this.options.keyBindings == 'object' ) {
                for ( i in this.options.keyBindings ) {
                    if ( typeof this.options.keyBindings[i] == 'string' ) {
                        this.options.keyBindings[i] = this.options.keyBindings[i].toUpperCase().charCodeAt(0);
                    }
                }
            } else {
                this.options.keyBindings = {};
            }

            for ( i in keys ) {
                this.options.keyBindings[i] = this.options.keyBindings[i] || keys[i];
            }

            utils.addEvent(window, 'keydown', this);

            this.on('destroy', function () {
                utils.removeEvent(window, 'keydown', this);
            });
        },

        _key: function (e) {
            if ( !this.enabled ) {
                return;
            }

            var snap = this.options.snap,   // we are using this alot, better to cache it
                newX = snap ? this.currentPage.pageX : this.x,
                newY = snap ? this.currentPage.pageY : this.y,
                now = utils.getTime(),
                prevTime = this.keyTime || 0,
                acceleration = 0.250,
                pos;

            if ( this.options.useTransition && this.isInTransition ) {
                pos = this.getComputedPosition();

                this._translate(Math.round(pos.x), Math.round(pos.y));
                this.isInTransition = false;
            }

            this.keyAcceleration = now - prevTime < 200 ? Math.min(this.keyAcceleration + acceleration, 50) : 0;

            switch ( e.keyCode ) {
                case this.options.keyBindings.pageUp:
                    if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
                        newX += snap ? 1 : this.wrapperWidth;
                    } else {
                        newY += snap ? 1 : this.wrapperHeight;
                    }
                    break;
                case this.options.keyBindings.pageDown:
                    if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
                        newX -= snap ? 1 : this.wrapperWidth;
                    } else {
                        newY -= snap ? 1 : this.wrapperHeight;
                    }
                    break;
                case this.options.keyBindings.end:
                    newX = snap ? this.pages.length-1 : this.maxScrollX;
                    newY = snap ? this.pages[0].length-1 : this.maxScrollY;
                    break;
                case this.options.keyBindings.home:
                    newX = 0;
                    newY = 0;
                    break;
                case this.options.keyBindings.left:
                    newX += snap ? -1 : 5 + this.keyAcceleration>>0;
                    break;
                case this.options.keyBindings.up:
                    newY += snap ? 1 : 5 + this.keyAcceleration>>0;
                    break;
                case this.options.keyBindings.right:
                    newX -= snap ? -1 : 5 + this.keyAcceleration>>0;
                    break;
                case this.options.keyBindings.down:
                    newY -= snap ? 1 : 5 + this.keyAcceleration>>0;
                    break;
                default:
                    return;
            }

            if ( snap ) {
                this.goToPage(newX, newY);
                return;
            }

            if ( newX > 0 ) {
                newX = 0;
                this.keyAcceleration = 0;
            } else if ( newX < this.maxScrollX ) {
                newX = this.maxScrollX;
                this.keyAcceleration = 0;
            }

            if ( newY > 0 ) {
                newY = 0;
                this.keyAcceleration = 0;
            } else if ( newY < this.maxScrollY ) {
                newY = this.maxScrollY;
                this.keyAcceleration = 0;
            }

            this.scrollTo(newX, newY, 0);

            this.keyTime = now;
        },

        _animate: function (destX, destY, duration, easingFn) {
            var that = this,
                startX = this.x,
                startY = this.y,
                startTime = utils.getTime(),
                destTime = startTime + duration;

            function step () {
                var now = utils.getTime(),
                    newX, newY,
                    easing;

                if ( now >= destTime ) {
                    that.isAnimating = false;
                    that._translate(destX, destY);

                    if ( !that.resetPosition(that.options.bounceTime) ) {
                        that._execEvent('scrollEnd');
                    }

                    return;
                }

                now = ( now - startTime ) / duration;
                easing = easingFn(now);
                newX = ( destX - startX ) * easing + startX;
                newY = ( destY - startY ) * easing + startY;
                that._translate(newX, newY);

                if ( that.isAnimating ) {
                    rAF(step);
                }
            }

            this.isAnimating = true;
            step();
        },
        handleEvent: function (e) {
            switch ( e.type ) {
                case 'touchstart':
                case 'pointerdown':
                case 'MSPointerDown':
                case 'mousedown':
                    this._start(e);
                    break;
                case 'touchmove':
                case 'pointermove':
                case 'MSPointerMove':
                case 'mousemove':
                    this._move(e);
                    break;
                case 'touchend':
                case 'pointerup':
                case 'MSPointerUp':
                case 'mouseup':
                case 'touchcancel':
                case 'pointercancel':
                case 'MSPointerCancel':
                case 'mousecancel':
                    this._end(e);
                    break;
                case 'orientationchange':
                case 'resize':
                    this._resize();
                    break;
                case 'transitionend':
                case 'webkitTransitionEnd':
                case 'oTransitionEnd':
                case 'MSTransitionEnd':
                    this._transitionEnd(e);
                    break;
                case 'wheel':
                case 'DOMMouseScroll':
                case 'mousewheel':
                    this._wheel(e);
                    break;
                case 'keydown':
                    this._key(e);
                    break;
                case 'click':
                    if ( this.enabled && !e._constructed ) {
                        e.preventDefault();
                        e.stopPropagation();
                    }
                    break;
            }
        }
    };
    function createDefaultScrollbar (direction, interactive, type) {
        var scrollbar = document.createElement('div'),
            indicator = document.createElement('div');

        if ( type === true ) {
            scrollbar.style.cssText = 'position:absolute;z-index:9999';
            indicator.style.cssText = '-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;position:absolute;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);border-radius:3px';
        }

        indicator.className = 'iScrollIndicator';

        if ( direction == 'h' ) {
            if ( type === true ) {
                scrollbar.style.cssText += ';height:7px;left:2px;right:2px;bottom:0';
                indicator.style.height = '100%';
            }
            scrollbar.className = 'iScrollHorizontalScrollbar';
        } else {
            if ( type === true ) {
                scrollbar.style.cssText += ';width:7px;bottom:2px;top:2px;right:1px';
                indicator.style.width = '100%';
            }
            scrollbar.className = 'iScrollVerticalScrollbar';
        }

        scrollbar.style.cssText += ';overflow:hidden';

        if ( !interactive ) {
            scrollbar.style.pointerEvents = 'none';
        }

        scrollbar.appendChild(indicator);

        return scrollbar;
    }

    function Indicator (scroller, options) {
        this.wrapper = typeof options.el == 'string' ? document.querySelector(options.el) : options.el;
        this.wrapperStyle = this.wrapper.style;
        this.indicator = this.wrapper.children[0];
        this.indicatorStyle = this.indicator.style;
        this.scroller = scroller;

        this.options = {
            listenX: true,
            listenY: true,
            interactive: false,
            resize: true,
            defaultScrollbars: false,
            shrink: false,
            fade: false,
            speedRatioX: 0,
            speedRatioY: 0
        };

        for ( var i in options ) {
            this.options[i] = options[i];
        }

        this.sizeRatioX = 1;
        this.sizeRatioY = 1;
        this.maxPosX = 0;
        this.maxPosY = 0;

        if ( this.options.interactive ) {
            if ( !this.options.disableTouch ) {
                utils.addEvent(this.indicator, 'touchstart', this);
                utils.addEvent(window, 'touchend', this);
            }
            if ( !this.options.disablePointer ) {
                utils.addEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
                utils.addEvent(window, utils.prefixPointerEvent('pointerup'), this);
            }
            if ( !this.options.disableMouse ) {
                utils.addEvent(this.indicator, 'mousedown', this);
                utils.addEvent(window, 'mouseup', this);
            }
        }

        if ( this.options.fade ) {
            this.wrapperStyle[utils.style.transform] = this.scroller.translateZ;
            var durationProp = utils.style.transitionDuration;
            if(!durationProp) {
                return;
            }
            this.wrapperStyle[durationProp] = utils.isBadAndroid ? '0.0001ms' : '0ms';
            // remove 0.0001ms
            var self = this;
            if(utils.isBadAndroid) {
                rAF(function() {
                    if(self.wrapperStyle[durationProp] === '0.0001ms') {
                        self.wrapperStyle[durationProp] = '0s';
                    }
                });
            }
            this.wrapperStyle.opacity = '0';
        }
    }

    Indicator.prototype = {
        handleEvent: function (e) {
            switch ( e.type ) {
                case 'touchstart':
                case 'pointerdown':
                case 'MSPointerDown':
                case 'mousedown':
                    this._start(e);
                    break;
                case 'touchmove':
                case 'pointermove':
                case 'MSPointerMove':
                case 'mousemove':
                    this._move(e);
                    break;
                case 'touchend':
                case 'pointerup':
                case 'MSPointerUp':
                case 'mouseup':
                case 'touchcancel':
                case 'pointercancel':
                case 'MSPointerCancel':
                case 'mousecancel':
                    this._end(e);
                    break;
            }
        },

        destroy: function () {
            if ( this.options.fadeScrollbars ) {
                clearTimeout(this.fadeTimeout);
                this.fadeTimeout = null;
            }
            if ( this.options.interactive ) {
                utils.removeEvent(this.indicator, 'touchstart', this);
                utils.removeEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
                utils.removeEvent(this.indicator, 'mousedown', this);

                utils.removeEvent(window, 'touchmove', this);
                utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
                utils.removeEvent(window, 'mousemove', this);

                utils.removeEvent(window, 'touchend', this);
                utils.removeEvent(window, utils.prefixPointerEvent('pointerup'), this);
                utils.removeEvent(window, 'mouseup', this);
            }

            if ( this.options.defaultScrollbars ) {
                this.wrapper.parentNode.removeChild(this.wrapper);
            }
        },

        _start: function (e) {
            var point = e.touches ? e.touches[0] : e;

            e.preventDefault();
            e.stopPropagation();

            this.transitionTime();

            this.initiated = true;
            this.moved = false;
            this.lastPointX = point.pageX;
            this.lastPointY = point.pageY;

            this.startTime  = utils.getTime();

            if ( !this.options.disableTouch ) {
                utils.addEvent(window, 'touchmove', this);
            }
            if ( !this.options.disablePointer ) {
                utils.addEvent(window, utils.prefixPointerEvent('pointermove'), this);
            }
            if ( !this.options.disableMouse ) {
                utils.addEvent(window, 'mousemove', this);
            }

            this.scroller._execEvent('beforeScrollStart');
        },

        _move: function (e) {
            var point = e.touches ? e.touches[0] : e,
                deltaX, deltaY,
                newX, newY,
                timestamp = utils.getTime();

            if ( !this.moved ) {
                this.scroller._execEvent('scrollStart');
            }

            this.moved = true;

            deltaX = point.pageX - this.lastPointX;
            this.lastPointX = point.pageX;

            deltaY = point.pageY - this.lastPointY;
            this.lastPointY = point.pageY;

            newX = this.x + deltaX;
            newY = this.y + deltaY;

            this._pos(newX, newY);

// INSERT POINT: indicator._move

            e.preventDefault();
            e.stopPropagation();
        },

        _end: function (e) {
            if ( !this.initiated ) {
                return;
            }

            this.initiated = false;

            e.preventDefault();
            e.stopPropagation();

            utils.removeEvent(window, 'touchmove', this);
            utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
            utils.removeEvent(window, 'mousemove', this);

            if ( this.scroller.options.snap ) {
                var snap = this.scroller._nearestSnap(this.scroller.x, this.scroller.y);

                var time = this.options.snapSpeed || Math.max(
                    Math.max(
                        Math.min(Math.abs(this.scroller.x - snap.x), 1000),
                        Math.min(Math.abs(this.scroller.y - snap.y), 1000)
                    ), 300);

                if ( this.scroller.x != snap.x || this.scroller.y != snap.y ) {
                    this.scroller.directionX = 0;
                    this.scroller.directionY = 0;
                    this.scroller.currentPage = snap;
                    this.scroller.scrollTo(snap.x, snap.y, time, this.scroller.options.bounceEasing);
                }
            }

            if ( this.moved ) {
                this.scroller._execEvent('scrollEnd');
            }
        },

        transitionTime: function (time) {
            time = time || 0;
            var durationProp = utils.style.transitionDuration;
            if(!durationProp) {
                return;
            }

            this.indicatorStyle[durationProp] = time + 'ms';

            if ( !time && utils.isBadAndroid ) {
                this.indicatorStyle[durationProp] = '0.0001ms';
                // remove 0.0001ms
                var self = this;
                rAF(function() {
                    if(self.indicatorStyle[durationProp] === '0.0001ms') {
                        self.indicatorStyle[durationProp] = '0s';
                    }
                });
            }
        },

        transitionTimingFunction: function (easing) {
            this.indicatorStyle[utils.style.transitionTimingFunction] = easing;
        },

        refresh: function () {
            this.transitionTime();

            if ( this.options.listenX && !this.options.listenY ) {
                this.indicatorStyle.display = this.scroller.hasHorizontalScroll ? 'block' : 'none';
            } else if ( this.options.listenY && !this.options.listenX ) {
                this.indicatorStyle.display = this.scroller.hasVerticalScroll ? 'block' : 'none';
            } else {
                this.indicatorStyle.display = this.scroller.hasHorizontalScroll || this.scroller.hasVerticalScroll ? 'block' : 'none';
            }

            if ( this.scroller.hasHorizontalScroll && this.scroller.hasVerticalScroll ) {
                utils.addClass(this.wrapper, 'iScrollBothScrollbars');
                utils.removeClass(this.wrapper, 'iScrollLoneScrollbar');

                if ( this.options.defaultScrollbars && this.options.customStyle ) {
                    if ( this.options.listenX ) {
                        this.wrapper.style.right = '8px';
                    } else {
                        this.wrapper.style.bottom = '8px';
                    }
                }
            } else {
                utils.removeClass(this.wrapper, 'iScrollBothScrollbars');
                utils.addClass(this.wrapper, 'iScrollLoneScrollbar');

                if ( this.options.defaultScrollbars && this.options.customStyle ) {
                    if ( this.options.listenX ) {
                        this.wrapper.style.right = '2px';
                    } else {
                        this.wrapper.style.bottom = '2px';
                    }
                }
            }

            var r = this.wrapper.offsetHeight;  // force refresh

            if ( this.options.listenX ) {
                this.wrapperWidth = this.wrapper.clientWidth;
                if ( this.options.resize ) {
                    this.indicatorWidth = Math.max(Math.round(this.wrapperWidth * this.wrapperWidth / (this.scroller.scrollerWidth || this.wrapperWidth || 1)), 8);
                    this.indicatorStyle.width = this.indicatorWidth + 'px';
                } else {
                    this.indicatorWidth = this.indicator.clientWidth;
                }

                this.maxPosX = this.wrapperWidth - this.indicatorWidth;

                if ( this.options.shrink == 'clip' ) {
                    this.minBoundaryX = -this.indicatorWidth + 8;
                    this.maxBoundaryX = this.wrapperWidth - 8;
                } else {
                    this.minBoundaryX = 0;
                    this.maxBoundaryX = this.maxPosX;
                }

                this.sizeRatioX = this.options.speedRatioX || (this.scroller.maxScrollX && (this.maxPosX / this.scroller.maxScrollX));
            }

            if ( this.options.listenY ) {
                this.wrapperHeight = this.wrapper.clientHeight;
                if ( this.options.resize ) {
                    this.indicatorHeight = Math.max(Math.round(this.wrapperHeight * this.wrapperHeight / (this.scroller.scrollerHeight || this.wrapperHeight || 1)), 8);
                    this.indicatorStyle.height = this.indicatorHeight + 'px';
                } else {
                    this.indicatorHeight = this.indicator.clientHeight;
                }

                this.maxPosY = this.wrapperHeight - this.indicatorHeight;

                if ( this.options.shrink == 'clip' ) {
                    this.minBoundaryY = -this.indicatorHeight + 8;
                    this.maxBoundaryY = this.wrapperHeight - 8;
                } else {
                    this.minBoundaryY = 0;
                    this.maxBoundaryY = this.maxPosY;
                }

                this.maxPosY = this.wrapperHeight - this.indicatorHeight;
                this.sizeRatioY = this.options.speedRatioY || (this.scroller.maxScrollY && (this.maxPosY / this.scroller.maxScrollY));
            }

            this.updatePosition();
        },

        updatePosition: function () {
            var x = this.options.listenX && Math.round(this.sizeRatioX * this.scroller.x) || 0,
                y = this.options.listenY && Math.round(this.sizeRatioY * this.scroller.y) || 0;

            if ( !this.options.ignoreBoundaries ) {
                if ( x < this.minBoundaryX ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.width = Math.max(this.indicatorWidth + x, 8);
                        this.indicatorStyle.width = this.width + 'px';
                    }
                    x = this.minBoundaryX;
                } else if ( x > this.maxBoundaryX ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.width = Math.max(this.indicatorWidth - (x - this.maxPosX), 8);
                        this.indicatorStyle.width = this.width + 'px';
                        x = this.maxPosX + this.indicatorWidth - this.width;
                    } else {
                        x = this.maxBoundaryX;
                    }
                } else if ( this.options.shrink == 'scale' && this.width != this.indicatorWidth ) {
                    this.width = this.indicatorWidth;
                    this.indicatorStyle.width = this.width + 'px';
                }

                if ( y < this.minBoundaryY ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.height = Math.max(this.indicatorHeight + y * 3, 8);
                        this.indicatorStyle.height = this.height + 'px';
                    }
                    y = this.minBoundaryY;
                } else if ( y > this.maxBoundaryY ) {
                    if ( this.options.shrink == 'scale' ) {
                        this.height = Math.max(this.indicatorHeight - (y - this.maxPosY) * 3, 8);
                        this.indicatorStyle.height = this.height + 'px';
                        y = this.maxPosY + this.indicatorHeight - this.height;
                    } else {
                        y = this.maxBoundaryY;
                    }
                } else if ( this.options.shrink == 'scale' && this.height != this.indicatorHeight ) {
                    this.height = this.indicatorHeight;
                    this.indicatorStyle.height = this.height + 'px';
                }
            }

            this.x = x;
            this.y = y;

            if ( this.scroller.options.useTransform ) {
                this.indicatorStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.scroller.translateZ;
            } else {
                this.indicatorStyle.left = x + 'px';
                this.indicatorStyle.top = y + 'px';
            }
        },

        _pos: function (x, y) {
            if ( x < 0 ) {
                x = 0;
            } else if ( x > this.maxPosX ) {
                x = this.maxPosX;
            }

            if ( y < 0 ) {
                y = 0;
            } else if ( y > this.maxPosY ) {
                y = this.maxPosY;
            }

            x = this.options.listenX ? Math.round(x / this.sizeRatioX) : this.scroller.x;
            y = this.options.listenY ? Math.round(y / this.sizeRatioY) : this.scroller.y;

            this.scroller.scrollTo(x, y);
        },

        fade: function (val, hold) {
            if ( hold && !this.visible ) {
                return;
            }

            clearTimeout(this.fadeTimeout);
            this.fadeTimeout = null;

            var time = val ? 250 : 500,
                delay = val ? 0 : 300;

            val = val ? '1' : '0';

            this.wrapperStyle[utils.style.transitionDuration] = time + 'ms';

            this.fadeTimeout = setTimeout((function (val) {
                this.wrapperStyle.opacity = val;
                this.visible = +val;
            }).bind(this, val), delay);
        }
    };

    IScroll.utils = utils;

    if ( typeof module != 'undefined' && module.exports ) {
        module.exports = IScroll;
    } else if ( typeof define == 'function' && define.amd ) {
        define( function () { return IScroll; } );

        //making sure scrollOverflow works when using Require.js
        //in the browser
        if(typeof window !== 'undefined'){
            window.IScroll = IScroll;
        }
    } else {
        window.IScroll = IScroll;
    }

})(window, document, Math);


/*!
* Scrolloverflow 2.0.2 module for fullPage.js >= 3
* https://github.com/alvarotrigo/fullPage.js
* @license MIT licensed
*
* Copyright (C) 2015 alvarotrigo.com - A project by Alvaro Trigo
*/
(function (window, document) {
    window.fp_scrolloverflow = (function() {

        // check if IScroll is available in global scope
        if (!window.IScroll) {
            // otherwise create local one from module.exports
            IScroll = module.exports;
        }

        // keeping central set of classnames and selectors
        var SCROLLABLE =            'fp-scrollable';
        var SCROLLABLE_SEL =        '.' + SCROLLABLE;

        var ACTIVE =                'active';
        var ACTIVE_SEL =            '.' + ACTIVE;

        var SECTION =               'fp-section';
        var SECTION_SEL =           '.' + SECTION;
        var SECTION_ACTIVE_SEL =    SECTION_SEL + ACTIVE_SEL;

        var SLIDE =                 'fp-slide';
        var SLIDE_SEL =             '.' + SLIDE;
        var SLIDE_ACTIVE_SEL =      SLIDE_SEL + ACTIVE_SEL;

        var SLIDES_WRAPPER =        'fp-slides';
        var SLIDES_WRAPPER_SEL =    '.' + SLIDES_WRAPPER;

        var TABLE_CELL =            'fp-tableCell';
        var TABLE_CELL_SEL =        '.' + TABLE_CELL;

        var RESPONSIVE =            'fp-responsive';
        var AUTO_HEIGHT_RESPONSIVE= 'fp-auto-height-responsive';

        /*
        * Turns iScroll `mousewheel` option off dynamically
        * https://github.com/cubiq/iscroll/issues/1036
        */
        IScroll.prototype.wheelOn = function () {
            this.wrapper.addEventListener('wheel', this);
            this.wrapper.addEventListener('mousewheel', this);
            this.wrapper.addEventListener('DOMMouseScroll', this);
        };

        /*
        * Turns iScroll `mousewheel` option on dynamically
        * https://github.com/cubiq/iscroll/issues/1036
        */
        IScroll.prototype.wheelOff = function () {
            this.wrapper.removeEventListener('wheel', this);
            this.wrapper.removeEventListener('mousewheel', this);
            this.wrapper.removeEventListener('DOMMouseScroll', this);
        };

        /**
         * Returns an integer representing the padding dimensions in px.
         */
        function getPaddings(element){
            var section = fp_utils.closest(element, SECTION_SEL);
            if(section != null){
                return parseInt(getComputedStyle(section)['padding-bottom']) + parseInt(getComputedStyle(section)['padding-top']);
            }
            return 0;
        }

        function scrollBarHandler(){
            var self = this;
            self.options = null;

            self.init = function(options, iscrollOptions){
                self.options = options;
                self.iscrollOptions = iscrollOptions;

                if(document.readyState === 'complete'){
                    createScrollBarForAll();
                    fullpage_api.shared.afterRenderActions();
                }
                //after DOM and images are loaded
                window.addEventListener('load', function(){
                    createScrollBarForAll();
                    fullpage_api.shared.afterRenderActions();
                });

                return self;
            };

            /**
             * Creates the scrollbar for the sections and slides in the site
             */
            function createScrollBarForAll(){
                if(fp_utils.hasClass(document.body, RESPONSIVE)){
                    removeResponsiveScrollOverflows();
                }
                else{
                    forEachSectionAndSlide(createScrollBar);
                }
            }

            /**
             * Checks if the element needs scrollbar and if the user wants to apply it.
             * If so it creates it.
             *
             * @param {Object} element   jQuery object of the section or slide
             */
            function createScrollBar(element){
                //User doesn't want scrollbar here? Sayonara baby!
                if(fp_utils.hasClass(element, 'fp-noscroll')) return;

                //necessary to make `scrollHeight` work under Opera 12
                fp_utils.css(element, {'overflow': 'hidden'});

                var scrollOverflowHandler = self.options.scrollOverflowHandler;
                var wrap = scrollOverflowHandler.wrapContent();
                var section = fp_utils.closest(element, SECTION_SEL); //in case element is a slide
                var scrollable = scrollOverflowHandler.scrollable(element);
                var contentHeight;
                var paddings = getPaddings(section);

                //if there was scroll, the contentHeight will be the one in the scrollable section
                if(scrollable != null){
                    contentHeight = scrollOverflowHandler.scrollHeight(element);
                }
                else{
                    contentHeight = element.scrollHeight - paddings;
                    if(self.options.verticalCentered){
                        contentHeight = $(TABLE_CELL_SEL, element)[0].scrollHeight - paddings;
                    }
                }

                var scrollHeight = fp_utils.getWindowHeight() - paddings;

                //needs scroll?
                if ( contentHeight > scrollHeight) {
                    //did we already have an scrollbar ? Updating it
                    if(scrollable != null){
                        scrollOverflowHandler.update(element, scrollHeight);
                    }
                    //creating the scrolling
                    else{
                        if(self.options.verticalCentered){
                            fp_utils.wrapInner($(TABLE_CELL_SEL, element)[0], wrap.scroller);
                            fp_utils.wrapInner($(TABLE_CELL_SEL, element)[0], wrap.scrollable);
                        }else{
                            fp_utils.wrapInner(element, wrap.scroller);
                            fp_utils.wrapInner(element, wrap.scrollable);
                        }
                        scrollOverflowHandler.create(element, scrollHeight, self.iscrollOptions);
                    }
                }

                //removing the scrolling when it is not necessary anymore
                else{
                    scrollOverflowHandler.remove(element);
                }

                //undo
                fp_utils.css(element, {'overflow': ''});
            }

            /**
             * Applies a callback function to each section in the site
             * or the slides within them
             */
            function forEachSectionAndSlide(callback){
                $(SECTION_SEL).forEach(function(section){
                    var slides = $(SLIDE_SEL, section);

                    if(slides.length){
                        slides.forEach(function(slide){
                            callback(slide);
                        });
                    }else{
                        callback(section);
                    }
                });
            }

            /**
             * Removes scrollOverflow for sections using the class `fp-auto-height-responsive`
             */
            function removeResponsiveScrollOverflows(){
                var scrollOverflowHandler = self.options.scrollOverflowHandler;
                forEachSectionAndSlide(function(element){
                    if(fp_utils.hasClass( fp_utils.closest(element, SECTION_SEL), AUTO_HEIGHT_RESPONSIVE)){
                        scrollOverflowHandler.remove(element);
                    }
                });
            }

            //public functions
            self.createScrollBarForAll = createScrollBarForAll;
        }

        /**
         * An object to handle overflow scrolling.
         * This uses jquery.slimScroll to accomplish overflow scrolling.
         * It is possible to pass in an alternate scrollOverflowHandler
         * to the fullpage.js option that implements the same functions
         * as this handler.
         *
         * @type {Object}
         */
        var $ = null;
        var g_fullpageOptions = null;
        var iscrollHandler = {
            refreshId: null,
            iScrollInstances: [],

            // Default options for iScroll.js used when using scrollOverflow
            iscrollOptions: {
                scrollbars: true,
                mouseWheel: true,
                hideScrollbars: false,
                fadeScrollbars: false,
                disableMouse: true,
                interactiveScrollbars: true
            },

            init: function(options){
                $ = fp_utils.$;
                g_fullpageOptions = options;

                var isTouch = (('ontouchstart' in window) || (navigator.msMaxTouchPoints > 0) || (navigator.maxTouchPoints));

                //fixing bug in iScroll with links: https://github.com/cubiq/iscroll/issues/783
                iscrollHandler.iscrollOptions.click = isTouch; // see #2035

                //extending iScroll options with the user custom ones
                iscrollHandler.iscrollOptions = fp_utils.deepExtend(iscrollHandler.iscrollOptions, options.scrollOverflowOptions);

                return new scrollBarHandler().init(options, iscrollHandler.iscrollOptions);
            },

            // Enables or disables the mouse wheel for the active section or all slides in it
            toggleWheel: function(value){
                var scrollable = $(SCROLLABLE_SEL, $(SECTION_ACTIVE_SEL)[0]);
                scrollable.forEach(function(item){
                    var iScrollInstance = item.fp_iscrollInstance;
                    if(iScrollInstance != null){
                        if(value){
                            iScrollInstance.wheelOn();
                        }
                        else{
                            iScrollInstance.wheelOff();
                        }
                    }
                });
            },

            /**
             * Turns off iScroll for the destination section.
             * When scrolling very fast on some trackpads (and Apple laptops) the inertial scrolling would
             * scroll the destination section/slide before the sections animations ends.
             */
            onLeave: function(){
                iscrollHandler.toggleWheel(false);
            },

            // Turns off iScroll for the leaving section
            beforeLeave: function(){
                iscrollHandler.onLeave()
            },

            // Turns on iScroll on section load
            afterLoad: function(){
                iscrollHandler.toggleWheel(true);
            },

            /**
             * Called when overflow scrolling is needed for a section.
             *
             * @param  {Object} element      jQuery object containing current section
             * @param  {Number} scrollHeight Current window height in pixels
             */
            create: function(element, scrollHeight, iscrollOptions) {
                var scrollable = $(SCROLLABLE_SEL, element);

                scrollable.forEach(function(item) {
                    fp_utils.css(item, {'height': scrollHeight + 'px'});

                    var iScrollInstance = item.fp_iscrollInstance;
                    if (iScrollInstance != null) {
                        iscrollHandler.iScrollInstances.forEach(function(instance){
                            instance.destroy();
                        });
                    }

                    iScrollInstance = new IScroll(item, iscrollOptions);
                    iscrollHandler.iScrollInstances.push(iScrollInstance);

                    if(!fp_utils.hasClass(fp_utils.closest(element, SECTION_SEL), ACTIVE)){
                        //off by default until the section gets active
                        iScrollInstance.wheelOff();
                    }

                    item.fp_iscrollInstance = iScrollInstance;
                });
            },

            /**
             * Return a boolean depending on whether the scrollable element is a
             * the end or at the start of the scrolling depending on the given type.
             *
             * @param  {String}  type       Either 'top' or 'bottom'
             * @param  {Object}  scrollable jQuery object for the scrollable element
             * @return {Boolean}
             */
            isScrolled: function(type, scrollable) {
                var scroller = scrollable.fp_iscrollInstance;

                //no scroller?
                if (!scroller) {
                    return true;
                }

                if (type === 'top'){
                    return scroller.y >= 0 && !fp_utils.getScrollTop(scrollable);
                } else if (type === 'bottom') {
                    return (0 - scroller.y) + fp_utils.getScrollTop(scrollable) + 1 + scrollable.offsetHeight >= scrollable.scrollHeight;
                }
            },

            /**
             * Returns the scrollable element for the given section.
             * If there are landscape slides, will only return a scrollable element
             * if it is in the active slide.
             *
             * @param  {Object}  activeSection jQuery object containing current section
             * @return {Boolean}
             */
            scrollable: function(activeSection){
                // if there are landscape slides, we check if the scrolling bar is in the current one or not
                if ($(SLIDES_WRAPPER_SEL, activeSection).length) {
                    return $(SCROLLABLE_SEL, $(SLIDE_ACTIVE_SEL, activeSection)[0] )[0];
                }
                return $(SCROLLABLE_SEL, activeSection)[0];
            },

            /**
             * Returns the scroll height of the wrapped content.
             * If this is larger than the window height minus section padding,
             * overflow scrolling is needed.
             *
             * @param  {Object} element jQuery object containing current section
             * @return {Number}
             */
            scrollHeight: function(element) {
                return $('.fp-scroller', $(SCROLLABLE_SEL, element)[0] )[0].scrollHeight;
            },

            /**
             * Called when overflow scrolling is no longer needed for a section.
             *
             * @param  {Object} element      jQuery object containing current section
             */
            remove: function(element) {
                if(element == null) return;

                var scrollable = $(SCROLLABLE_SEL, element)[0];
                if (scrollable != null) {
                    var iScrollInstance = scrollable.fp_iscrollInstance;
                    if(iScrollInstance != null){
                        iScrollInstance.destroy();
                    }

                    scrollable.fp_iscrollInstance = null;

                    //unwrapping...
                    fp_utils.unwrap($('.fp-scroller', element)[0]);
                    fp_utils.unwrap($(SCROLLABLE_SEL, element)[0]);
                }
            },

            /**
             * Called when overflow scrolling has already been setup but the
             * window height has potentially changed.
             *
             * @param  {Object} element      jQuery object containing current section
             * @param  {Number} scrollHeight Current window height in pixels
             */
            update: function(element, scrollHeight) {
                //using a timeout in order to execute the refresh function only once when `update` is called multiple times in a
                //short period of time.
                //it also comes on handy because iScroll requires the use of timeout when using `refresh`.
                clearTimeout(iscrollHandler.refreshId);
                iscrollHandler.refreshId = setTimeout(function(){
                    iscrollHandler.iScrollInstances.forEach(function(instance){
                        instance.refresh();

                        //ugly hack that we are forced to use due to the timeout delay
                        //otherwise done on the fullpage.js reBuild function
                        fullpage_api.silentMoveTo(fp_utils.index($(SECTION_ACTIVE_SEL)[0]) + 1);
                    });
                }, 150);

                //updating the wrappers height
                fp_utils.css($(SCROLLABLE_SEL, element)[0], {'height': scrollHeight + 'px'});

                if(g_fullpageOptions.verticalCentered){
                    fp_utils.css($(SCROLLABLE_SEL, element)[0].parentNode, {'height': scrollHeight + 'px'});
                }
            },

            /**
             * Called to get any additional elements needed to wrap the section
             * content in order to facilitate overflow scrolling.
             *
             * @return {String|Object} Can be a string containing HTML,
             *                         a DOM element, or jQuery object.
             */
            wrapContent: function() {
                var scrollable = document.createElement('div');
                scrollable.className = SCROLLABLE;

                var scroller = document.createElement('div');
                scroller.className = 'fp-scroller';

                return {
                    scrollable: scrollable,
                    scroller: scroller
                };
            }
        };

        return {
            iscrollHandler: iscrollHandler
        };
    })();
})(window, document);