/*! iScroll v5.1.2 ~ (c) 2008-2014 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(9).toUpperCase() + pointerEvent.substr(10):
                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)
        me.isBadAndroid = /Android /.test(window.navigator.appVersion) && !(/Chrome\/\d/.test(window.navigator.appVersion));

        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) ) {
                ev = document.createEvent('MouseEvents');
                ev.initMouseEvent('click', true, true, e.view, 1,
                    target.screenX, target.screenY, target.clientX, target.clientY,
                    e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
                    0, 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 = {

// INSERT POINT: OPTIONS 

            startX: 0,
            startY: 0,
            scrollY: true,
            directionLockThreshold: 5,
            momentum: true,

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

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

            HWCompositing: true,
            useTransition: true,
            useTransform: true
        };

        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';
        }

// 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: '5.1.2',

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

// INSERT POINT: _init

        },

        destroy: function () {
            this._initEvents(true);

            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 ) {
                if ( e.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._transitionTime();

            this.startTime = utils.getTime();

            if ( this.options.useTransition && this.isInTransition ) {
                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;
            }

// 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;

            if ( !time || (this.options.useTransition && easing.style) ) {
                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) {
            time = time || 0;

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

            if ( !time && utils.isBadAndroid ) {
                this.scrollerStyle[utils.style.transitionDuration] = '0.001s';
            }

// INSERT POINT: _transitionTime

        },

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

// 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 };
        },

        _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 ( !e._constructed ) {
                        e.preventDefault();
                        e.stopPropagation();
                    }
                    break;
            }
        }
    };
    IScroll.utils = utils;

    if ( typeof module != 'undefined' && module.exports ) {
        module.exports = IScroll;
    } else {
        window.IScroll = IScroll;
    }

})(window, document, Math);