/*!

 * iScroll v4.2.5 ~ Copyright (c) 2012 Matteo Spinelli, http://cubiq.org

 * Released under MIT license, http://cubiq.org/license

 */

(function(window, doc){

var m = Math,

	dummyStyle = doc.createElement('div').style,

	vendor = (function () {

		var vendors = 't,webkitT,MozT,msT,OT'.split(','),

			t,

			i = 0,

			l = vendors.length;



		for ( ; i < l; i++ ) {

			t = vendors[i] + 'ransform';

			if ( t in dummyStyle ) {

				return vendors[i].substr(0, vendors[i].length - 1);

			}

		}



		return false;

	})(),

	cssVendor = vendor ? '-' + vendor.toLowerCase() + '-' : '',



	// Style properties

	transform = prefixStyle('transform'),

	transitionProperty = prefixStyle('transitionProperty'),

	transitionDuration = prefixStyle('transitionDuration'),

	transformOrigin = prefixStyle('transformOrigin'),

	transitionTimingFunction = prefixStyle('transitionTimingFunction'),

	transitionDelay = prefixStyle('transitionDelay'),



    // Browser capabilities

	isAndroid = (/android/gi).test(navigator.appVersion),

	isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),

	isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),



    has3d = prefixStyle('perspective') in dummyStyle,

    hasTouch = 'ontouchstart' in window && !isTouchPad,

    hasTransform = vendor !== false,

    hasTransitionEnd = prefixStyle('transition') in dummyStyle,



	RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',

	START_EV = hasTouch ? 'touchstart' : 'mousedown',

	MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',

	END_EV = hasTouch ? 'touchend' : 'mouseup',

	CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',

	TRNEND_EV = (function () {

		if ( vendor === false ) return false;



		var transitionEnd = {

				''			: 'transitionend',

				'webkit'	: 'webkitTransitionEnd',

				'Moz'		: 'transitionend',

				'O'			: 'otransitionend',

				'ms'		: 'MSTransitionEnd'

			};



		return transitionEnd[vendor];

	})(),



	nextFrame = (function() {

		return window.requestAnimationFrame ||

			window.webkitRequestAnimationFrame ||

			window.mozRequestAnimationFrame ||

			window.oRequestAnimationFrame ||

			window.msRequestAnimationFrame ||

			function(callback) { return setTimeout(callback, 1); };

	})(),

	cancelFrame = (function () {

		return window.cancelRequestAnimationFrame ||

			window.webkitCancelAnimationFrame ||

			window.webkitCancelRequestAnimationFrame ||

			window.mozCancelRequestAnimationFrame ||

			window.oCancelRequestAnimationFrame ||

			window.msCancelRequestAnimationFrame ||

			clearTimeout;

	})(),



	// Helpers

	translateZ = has3d ? ' translateZ(0)' : '',



	// Constructor

	iScroll = function (el, options) {

		var that = this,

			i;



		that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);

		that.wrapper.style.overflow = 'hidden';

		that.scroller = that.wrapper.children[0];



		// Default options

		that.options = {

			hScroll: true,

			vScroll: true,

			x: 0,

			y: 0,

			bounce: true,

			bounceLock: false,

			momentum: true,

			lockDirection: true,

			useTransform: true,

			useTransition: false,

			topOffset: 0,

			checkDOMChanges: false,		// Experimental

			handleClick: true,



			// Scrollbar

			hScrollbar: true,

			vScrollbar: true,

			fixedScrollbar: isAndroid,

			hideScrollbar: isIDevice,

			fadeScrollbar: isIDevice && has3d,

			scrollbarClass: '',



			// Zoom

			zoom: false,

			zoomMin: 1,

			zoomMax: 4,

			doubleTapZoom: 2,

			wheelAction: 'scroll',



			// Snap

			snap: false,

			snapThreshold: 1,



			// Events

			onRefresh: null,

			onBeforeScrollStart: function (e) { e.preventDefault(); },

			onScrollStart: null,

			onBeforeScrollMove: null,

			onScrollMove: null,

			onBeforeScrollEnd: null,

			onScrollEnd: null,

			onTouchEnd: null,

			onDestroy: null,

			onZoomStart: null,

			onZoom: null,

			onZoomEnd: null

		};



		// User defined options

		for (i in options) that.options[i] = options[i];

		

		// Set starting position

		that.x = that.options.x;

		that.y = that.options.y;



		// Normalize options

		that.options.useTransform = hasTransform && that.options.useTransform;

		that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;

		that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;

		that.options.zoom = that.options.useTransform && that.options.zoom;

		that.options.useTransition = hasTransitionEnd && that.options.useTransition;



		// Helpers FIX ANDROID BUG!

		// translate3d and scale doesn't work together!

		// Ignoring 3d ONLY WHEN YOU SET that.options.zoom

		if ( that.options.zoom && isAndroid ){

			translateZ = '';

		}

		

		// Set some default styles

		that.scroller.style[transitionProperty] = that.options.useTransform ? cssVendor + 'transform' : 'top left';

		that.scroller.style[transitionDuration] = '0';

		that.scroller.style[transformOrigin] = '0 0';

		if (that.options.useTransition) that.scroller.style[transitionTimingFunction] = 'cubic-bezier(0.33,0.66,0.66,1)';

		

		if (that.options.useTransform) that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px)' + translateZ;

		else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';



		if (that.options.useTransition) that.options.fixedScrollbar = true;



		that.refresh();



		that._bind(RESIZE_EV, window);

		that._bind(START_EV);

		if (!hasTouch) {

			if (that.options.wheelAction != 'none') {

				that._bind('DOMMouseScroll');

				that._bind('mousewheel');

			}

		}



		if (that.options.checkDOMChanges) that.checkDOMTime = setInterval(function () {

			that._checkDOMChanges();

		}, 500);

	};



// Prototype

iScroll.prototype = {

	enabled: true,

	x: 0,

	y: 0,

	steps: [],

	scale: 1,

	currPageX: 0, currPageY: 0,

	pagesX: [], pagesY: [],

	aniTime: null,

	wheelZoomCount: 0,

	

	handleEvent: function (e) {

		var that = this;

		switch(e.type) {

			case START_EV:

				if (!hasTouch && e.button !== 0) return;

				that._start(e);

				break;

			case MOVE_EV: that._move(e); break;

			case END_EV:

			case CANCEL_EV: that._end(e); break;

			case RESIZE_EV: that._resize(); break;

			case 'DOMMouseScroll': case 'mousewheel': that._wheel(e); break;

			case TRNEND_EV: that._transitionEnd(e); break;

		}

	},

	

	_checkDOMChanges: function () {

		if (this.moved || this.zoomed || this.animating ||

			(this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this.scale)) return;



		this.refresh();

	},

	

	_scrollbar: function (dir) {

		var that = this,

			bar;



		if (!that[dir + 'Scrollbar']) {

			if (that[dir + 'ScrollbarWrapper']) {

				if (hasTransform) that[dir + 'ScrollbarIndicator'].style[transform] = '';

				that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']);

				that[dir + 'ScrollbarWrapper'] = null;

				that[dir + 'ScrollbarIndicator'] = null;

			}



			return;

		}



		if (!that[dir + 'ScrollbarWrapper']) {

			// Create the scrollbar wrapper

			bar = doc.createElement('div');



			if (that.options.scrollbarClass) bar.className = that.options.scrollbarClass + dir.toUpperCase();

			else bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ? 'height:7px;bottom:1px;left:2px;right:' + (that.vScrollbar ? '7' : '2') + 'px' : 'width:7px;bottom:' + (that.hScrollbar ? '7' : '2') + 'px;top:2px;right:1px');



			bar.style.cssText += ';pointer-events:none;' + cssVendor + 'transition-property:opacity;' + cssVendor + 'transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options.hideScrollbar ? '0' : '1');



			that.wrapper.appendChild(bar);

			that[dir + 'ScrollbarWrapper'] = bar;



			// Create the scrollbar indicator

			bar = doc.createElement('div');

			if (!that.options.scrollbarClass) {

				bar.style.cssText = 'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);' + cssVendor + 'background-clip:padding-box;' + cssVendor + 'box-sizing:border-box;' + (dir == 'h' ? 'height:100%' : 'width:100%') + ';' + cssVendor + 'border-radius:3px;border-radius:3px';

			}

			bar.style.cssText += ';pointer-events:none;' + cssVendor + 'transition-property:' + cssVendor + 'transform;' + cssVendor + 'transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);' + cssVendor + 'transition-duration:0;' + cssVendor + 'transform: translate(0,0)' + translateZ;

			if (that.options.useTransition) bar.style.cssText += ';' + cssVendor + 'transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)';



			that[dir + 'ScrollbarWrapper'].appendChild(bar);

			that[dir + 'ScrollbarIndicator'] = bar;

		}



		if (dir == 'h') {

			that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;

			that.hScrollbarIndicatorSize = m.max(m.round(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);

			that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px';

			that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;

			that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;

		} else {

			that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;

			that.vScrollbarIndicatorSize = m.max(m.round(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);

			that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px';

			that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;

			that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;

		}



		// Reset position

		that._scrollbarPos(dir, true);

	},

	

	_resize: function () {

		var that = this;

		setTimeout(function () { that.refresh(); }, isAndroid ? 200 : 0);

	},

	

	_pos: function (x, y) {

		if (this.zoomed) return;



		x = this.hScroll ? x : 0;

		y = this.vScroll ? y : 0;



		if (this.options.useTransform) {

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

		} else {

			x = m.round(x);

			y = m.round(y);

			this.scroller.style.left = x + 'px';

			this.scroller.style.top = y + 'px';

		}



		this.x = x;

		this.y = y;



		this._scrollbarPos('h');

		this._scrollbarPos('v');

	},



	_scrollbarPos: function (dir, hidden) {

		var that = this,

			pos = dir == 'h' ? that.x : that.y,

			size;



		if (!that[dir + 'Scrollbar']) return;



		pos = that[dir + 'ScrollbarProp'] * pos;



		if (pos < 0) {

			if (!that.options.fixedScrollbar) {

				size = that[dir + 'ScrollbarIndicatorSize'] + m.round(pos * 3);

				if (size < 8) size = 8;

				that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';

			}

			pos = 0;

		} else if (pos > that[dir + 'ScrollbarMaxScroll']) {

			if (!that.options.fixedScrollbar) {

				size = that[dir + 'ScrollbarIndicatorSize'] - m.round((pos - that[dir + 'ScrollbarMaxScroll']) * 3);

				if (size < 8) size = 8;

				that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';

				pos = that[dir + 'ScrollbarMaxScroll'] + (that[dir + 'ScrollbarIndicatorSize'] - size);

			} else {

				pos = that[dir + 'ScrollbarMaxScroll'];

			}

		}



		that[dir + 'ScrollbarWrapper'].style[transitionDelay] = '0';

		that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';

		that[dir + 'ScrollbarIndicator'].style[transform] = 'translate(' + (dir == 'h' ? pos + 'px,0)' : '0,' + pos + 'px)') + translateZ;

	},

	

	_start: function (e) {

		var that = this,

			point = hasTouch ? e.touches[0] : e,

			matrix, x, y,

			c1, c2;



		if (!that.enabled) return;



		if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);



		if (that.options.useTransition || that.options.zoom) that._transitionTime(0);



		that.moved = false;

		that.animating = false;

		that.zoomed = false;

		that.distX = 0;

		that.distY = 0;

		that.absDistX = 0;

		that.absDistY = 0;

		that.dirX = 0;

		that.dirY = 0;



		// Gesture start

		if (that.options.zoom && hasTouch && e.touches.length > 1) {

			c1 = m.abs(e.touches[0].pageX-e.touches[1].pageX);

			c2 = m.abs(e.touches[0].pageY-e.touches[1].pageY);

			that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);



			that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;

			that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;



			if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);

		}



		if (that.options.momentum) {

			if (that.options.useTransform) {

				// Very lame general purpose alternative to CSSMatrix

				matrix = getComputedStyle(that.scroller, null)[transform].replace(/[^0-9\-.,]/g, '').split(',');

				x = +(matrix[12] || matrix[4]);

				y = +(matrix[13] || matrix[5]);

			} else {

				x = +getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '');

				y = +getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '');

			}

			

			if (x != that.x || y != that.y) {

				if (that.options.useTransition) that._unbind(TRNEND_EV);

				else cancelFrame(that.aniTime);

				that.steps = [];

				that._pos(x, y);

				if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);

			}

		}



		that.absStartX = that.x;	// Needed by snap threshold

		that.absStartY = that.y;



		that.startX = that.x;

		that.startY = that.y;

		that.pointX = point.pageX;

		that.pointY = point.pageY;



		that.startTime = e.timeStamp || Date.now();



		if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);



		that._bind(MOVE_EV, window);

		that._bind(END_EV, window);

		that._bind(CANCEL_EV, window);

	},

	

	_move: function (e) {

		var that = this,

			point = hasTouch ? e.touches[0] : e,

			deltaX = point.pageX - that.pointX,

			deltaY = point.pageY - that.pointY,

			newX = that.x + deltaX,

			newY = that.y + deltaY,

			c1, c2, scale,

			timestamp = e.timeStamp || Date.now();



		if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);



		// Zoom

		if (that.options.zoom && hasTouch && e.touches.length > 1) {

			c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);

			c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);

			that.touchesDist = m.sqrt(c1*c1+c2*c2);



			that.zoomed = true;



			scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;



			if (scale < that.options.zoomMin) scale = 0.5 * that.options.zoomMin * Math.pow(2.0, scale / that.options.zoomMin);

			else if (scale > that.options.zoomMax) scale = 2.0 * that.options.zoomMax * Math.pow(0.5, that.options.zoomMax / scale);



			that.lastScale = scale / this.scale;



			newX = this.originX - this.originX * that.lastScale + this.x;

			newY = this.originY - this.originY * that.lastScale + this.y;



			this.scroller.style[transform] = 'translate(' + newX + 'px,' + newY + 'px) scale(' + scale + ')' + translateZ;



			if (that.options.onZoom) that.options.onZoom.call(that, e);

			return;

		}



		that.pointX = point.pageX;

		that.pointY = point.pageY;



		// Slow down if outside of the boundaries

		if (newX > 0 || newX < that.maxScrollX) {

			newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;

		}

		if (newY > that.minScrollY || newY < that.maxScrollY) {

			newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY : that.maxScrollY;

		}



		that.distX += deltaX;

		that.distY += deltaY;

		that.absDistX = m.abs(that.distX);

		that.absDistY = m.abs(that.distY);



		if (that.absDistX < 6 && that.absDistY < 6) {

			return;

		}



		// Lock direction

		if (that.options.lockDirection) {

			if (that.absDistX > that.absDistY + 5) {

				newY = that.y;

				deltaY = 0;

			} else if (that.absDistY > that.absDistX + 5) {

				newX = that.x;

				deltaX = 0;

			}

		}



		that.moved = true;

		that._pos(newX, newY);

		that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;

		that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;



		if (timestamp - that.startTime > 300) {

			that.startTime = timestamp;

			that.startX = that.x;

			that.startY = that.y;

		}

		

		if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);

	},

	

	_end: function (e) {

		if (hasTouch && e.touches.length !== 0) return;



		var that = this,

			point = hasTouch ? e.changedTouches[0] : e,

			target, ev,

			momentumX = { dist:0, time:0 },

			momentumY = { dist:0, time:0 },

			duration = (e.timeStamp || Date.now()) - that.startTime,

			newPosX = that.x,

			newPosY = that.y,

			distX, distY,

			newDuration,

			snap,

			scale;



		that._unbind(MOVE_EV, window);

		that._unbind(END_EV, window);

		that._unbind(CANCEL_EV, window);



		if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);



		if (that.zoomed) {

			scale = that.scale * that.lastScale;

			scale = Math.max(that.options.zoomMin, scale);

			scale = Math.min(that.options.zoomMax, scale);

			that.lastScale = scale / that.scale;

			that.scale = scale;



			that.x = that.originX - that.originX * that.lastScale + that.x;

			that.y = that.originY - that.originY * that.lastScale + that.y;

			

			that.scroller.style[transitionDuration] = '200ms';

			that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px) scale(' + that.scale + ')' + translateZ;

			

			that.zoomed = false;

			that.refresh();



			if (that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);

			return;

		}



		if (!that.moved) {

			if (hasTouch) {

				if (that.doubleTapTimer && that.options.zoom) {

					// Double tapped

					clearTimeout(that.doubleTapTimer);

					that.doubleTapTimer = null;

					if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);

					that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);

					if (that.options.onZoomEnd) {

						setTimeout(function() {

							that.options.onZoomEnd.call(that, e);

						}, 200); // 200 is default zoom duration

					}

				} else if (this.options.handleClick) {

					that.doubleTapTimer = setTimeout(function () {

						that.doubleTapTimer = null;



						// Find the last touched element

						target = point.target;

						while (target.nodeType != 1) target = target.parentNode;



						if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {

							ev = doc.createEvent('MouseEvents');

							ev.initMouseEvent('click', true, true, e.view, 1,

								point.screenX, point.screenY, point.clientX, point.clientY,

								e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,

								0, null);

							ev._fake = true;

							target.dispatchEvent(ev);

						}

					}, that.options.zoom ? 250 : 0);

				}

			}



			that._resetPos(400);



			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);

			return;

		}



		if (duration < 300 && that.options.momentum) {

			momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;

			momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y - that.minScrollY : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;



			newPosX = that.x + momentumX.dist;

			newPosY = that.y + momentumY.dist;



			if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };

			if ((that.y > that.minScrollY && newPosY > that.minScrollY) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };

		}



		if (momentumX.dist || momentumY.dist) {

			newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);



			// Do we need to snap?

			if (that.options.snap) {

				distX = newPosX - that.absStartX;

				distY = newPosY - that.absStartY;

				if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) { that.scrollTo(that.absStartX, that.absStartY, 200); }

				else {

					snap = that._snap(newPosX, newPosY);

					newPosX = snap.x;

					newPosY = snap.y;

					newDuration = m.max(snap.time, newDuration);

				}

			}



			that.scrollTo(m.round(newPosX), m.round(newPosY), newDuration);



			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);

			return;

		}



		// Do we need to snap?

		if (that.options.snap) {

			distX = newPosX - that.absStartX;

			distY = newPosY - that.absStartY;

			if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) that.scrollTo(that.absStartX, that.absStartY, 200);

			else {

				snap = that._snap(that.x, that.y);

				if (snap.x != that.x || snap.y != that.y) that.scrollTo(snap.x, snap.y, snap.time);

			}



			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);

			return;

		}



		that._resetPos(200);

		if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);

	},

	

	_resetPos: function (time) {

		var that = this,

			resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,

			resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;



		if (resetX == that.x && resetY == that.y) {

			if (that.moved) {

				that.moved = false;

				if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);		// Execute custom code on scroll end

			}



			if (that.hScrollbar && that.options.hideScrollbar) {

				if (vendor == 'webkit') that.hScrollbarWrapper.style[transitionDelay] = '300ms';

				that.hScrollbarWrapper.style.opacity = '0';

			}

			if (that.vScrollbar && that.options.hideScrollbar) {

				if (vendor == 'webkit') that.vScrollbarWrapper.style[transitionDelay] = '300ms';

				that.vScrollbarWrapper.style.opacity = '0';

			}



			return;

		}



		that.scrollTo(resetX, resetY, time || 0);

	},



	_wheel: function (e) {

		var that = this,

			wheelDeltaX, wheelDeltaY,

			deltaX, deltaY,

			deltaScale;



		if ('wheelDeltaX' in e) {

			wheelDeltaX = e.wheelDeltaX / 12;

			wheelDeltaY = e.wheelDeltaY / 12;

		} else if('wheelDelta' in e) {

			wheelDeltaX = wheelDeltaY = e.wheelDelta / 12;

		} else if ('detail' in e) {

			wheelDeltaX = wheelDeltaY = -e.detail * 3;

		} else {

			return;

		}

		

		if (that.options.wheelAction == 'zoom') {

			deltaScale = that.scale * Math.pow(2, 1/3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0));

			if (deltaScale < that.options.zoomMin) deltaScale = that.options.zoomMin;

			if (deltaScale > that.options.zoomMax) deltaScale = that.options.zoomMax;

			

			if (deltaScale != that.scale) {

				if (!that.wheelZoomCount && that.options.onZoomStart) that.options.onZoomStart.call(that, e);

				that.wheelZoomCount++;

				

				that.zoom(e.pageX, e.pageY, deltaScale, 400);

				

				setTimeout(function() {

					that.wheelZoomCount--;

					if (!that.wheelZoomCount && that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);

				}, 400);

			}

			

			return;

		}

		

		deltaX = that.x + wheelDeltaX;

		deltaY = that.y + wheelDeltaY;



		if (deltaX > 0) deltaX = 0;

		else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;



		if (deltaY > that.minScrollY) deltaY = that.minScrollY;

		else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;

    

		if (that.maxScrollY < 0) {

			that.scrollTo(deltaX, deltaY, 0);

		}

	},

	

	_transitionEnd: function (e) {

		var that = this;



		if (e.target != that.scroller) return;



		that._unbind(TRNEND_EV);

		

		that._startAni();

	},





	/**

	*

	* Utilities

	*

	*/

	_startAni: function () {

		var that = this,

			startX = that.x, startY = that.y,

			startTime = Date.now(),

			step, easeOut,

			animate;



		if (that.animating) return;

		

		if (!that.steps.length) {

			that._resetPos(400);

			return;

		}

		

		step = that.steps.shift();

		

		if (step.x == startX && step.y == startY) step.time = 0;



		that.animating = true;

		that.moved = true;

		

		if (that.options.useTransition) {

			that._transitionTime(step.time);

			that._pos(step.x, step.y);

			that.animating = false;

			if (step.time) that._bind(TRNEND_EV);

			else that._resetPos(0);

			return;

		}



		animate = function () {

			var now = Date.now(),

				newX, newY;



			if (now >= startTime + step.time) {

				that._pos(step.x, step.y);

				that.animating = false;

				if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that);			// Execute custom code on animation end

				that._startAni();

				return;

			}



			now = (now - startTime) / step.time - 1;

			easeOut = m.sqrt(1 - now * now);

			newX = (step.x - startX) * easeOut + startX;

			newY = (step.y - startY) * easeOut + startY;

			that._pos(newX, newY);

			if (that.animating) that.aniTime = nextFrame(animate);

		};



		animate();

	},



	_transitionTime: function (time) {

		time += 'ms';

		this.scroller.style[transitionDuration] = time;

		if (this.hScrollbar) this.hScrollbarIndicator.style[transitionDuration] = time;

		if (this.vScrollbar) this.vScrollbarIndicator.style[transitionDuration] = time;

	},



	_momentum: function (dist, time, maxDistUpper, maxDistLower, size) {

		var deceleration = 0.0006,

			speed = m.abs(dist) / time,

			newDist = (speed * speed) / (2 * deceleration),

			newTime = 0, outsideDist = 0;



		// Proportinally reduce speed if we are outside of the boundaries

		if (dist > 0 && newDist > maxDistUpper) {

			outsideDist = size / (6 / (newDist / speed * deceleration));

			maxDistUpper = maxDistUpper + outsideDist;

			speed = speed * maxDistUpper / newDist;

			newDist = maxDistUpper;

		} else if (dist < 0 && newDist > maxDistLower) {

			outsideDist = size / (6 / (newDist / speed * deceleration));

			maxDistLower = maxDistLower + outsideDist;

			speed = speed * maxDistLower / newDist;

			newDist = maxDistLower;

		}



		newDist = newDist * (dist < 0 ? -1 : 1);

		newTime = speed / deceleration;



		return { dist: newDist, time: m.round(newTime) };

	},



	_offset: function (el) {

		var left = -el.offsetLeft,

			top = -el.offsetTop;

			

		while (el = el.offsetParent) {

			left -= el.offsetLeft;

			top -= el.offsetTop;

		}

		

		if (el != this.wrapper) {

			left *= this.scale;

			top *= this.scale;

		}



		return { left: left, top: top };

	},



	_snap: function (x, y) {

		var that = this,

			i, l,

			page, time,

			sizeX, sizeY;



		// Check page X

		page = that.pagesX.length - 1;

		for (i=0, l=that.pagesX.length; i<l; i++) {

			if (x >= that.pagesX[i]) {

				page = i;

				break;

			}

		}

		if (page == that.currPageX && page > 0 && that.dirX < 0) page--;

		x = that.pagesX[page];

		sizeX = m.abs(x - that.pagesX[that.currPageX]);

		sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;

		that.currPageX = page;



		// Check page Y

		page = that.pagesY.length-1;

		for (i=0; i<page; i++) {

			if (y >= that.pagesY[i]) {

				page = i;

				break;

			}

		}

		if (page == that.currPageY && page > 0 && that.dirY < 0) page--;

		y = that.pagesY[page];

		sizeY = m.abs(y - that.pagesY[that.currPageY]);

		sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;

		that.currPageY = page;



		// Snap with constant speed (proportional duration)

		time = m.round(m.max(sizeX, sizeY)) || 200;



		return { x: x, y: y, time: time };

	},



	_bind: function (type, el, bubble) {

		(el || this.scroller).addEventListener(type, this, !!bubble);

	},



	_unbind: function (type, el, bubble) {

		(el || this.scroller).removeEventListener(type, this, !!bubble);

	},





	/**

	*

	* Public methods

	*

	*/

	destroy: function () {

		var that = this;



		that.scroller.style[transform] = '';



		// Remove the scrollbars

		that.hScrollbar = false;

		that.vScrollbar = false;

		that._scrollbar('h');

		that._scrollbar('v');



		// Remove the event listeners

		that._unbind(RESIZE_EV, window);

		that._unbind(START_EV);

		that._unbind(MOVE_EV, window);

		that._unbind(END_EV, window);

		that._unbind(CANCEL_EV, window);

		

		if (!that.options.hasTouch) {

			that._unbind('DOMMouseScroll');

			that._unbind('mousewheel');

		}

		

		if (that.options.useTransition) that._unbind(TRNEND_EV);

		

		if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime);

		

		if (that.options.onDestroy) that.options.onDestroy.call(that);

	},



	refresh: function () {

		var that = this,

			offset,

			i, l,

			els,

			pos = 0,

			page = 0;



		if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin;

		that.wrapperW = that.wrapper.clientWidth || 1;

		that.wrapperH = that.wrapper.clientHeight || 1;



		that.minScrollY = -that.options.topOffset || 0;

		that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);

		that.scrollerH = m.round((that.scroller.offsetHeight + that.minScrollY) * that.scale);

		that.maxScrollX = that.wrapperW - that.scrollerW;

		that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;

		that.dirX = 0;

		that.dirY = 0;



		if (that.options.onRefresh) that.options.onRefresh.call(that);



		that.hScroll = that.options.hScroll && that.maxScrollX < 0;

		that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);



		that.hScrollbar = that.hScroll && that.options.hScrollbar;

		that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;



		offset = that._offset(that.wrapper);

		that.wrapperOffsetLeft = -offset.left;

		that.wrapperOffsetTop = -offset.top;



		// Prepare snap

		if (typeof that.options.snap == 'string') {

			that.pagesX = [];

			that.pagesY = [];

			els = that.scroller.querySelectorAll(that.options.snap);

			for (i=0, l=els.length; i<l; i++) {

				pos = that._offset(els[i]);

				pos.left += that.wrapperOffsetLeft;

				pos.top += that.wrapperOffsetTop;

				that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;

				that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;

			}

		} else if (that.options.snap) {

			that.pagesX = [];

			while (pos >= that.maxScrollX) {

				that.pagesX[page] = pos;

				pos = pos - that.wrapperW;

				page++;

			}

			if (that.maxScrollX%that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length-1] + that.pagesX[that.pagesX.length-1];



			pos = 0;

			page = 0;

			that.pagesY = [];

			while (pos >= that.maxScrollY) {

				that.pagesY[page] = pos;

				pos = pos - that.wrapperH;

				page++;

			}

			if (that.maxScrollY%that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length-1] + that.pagesY[that.pagesY.length-1];

		}



		// Prepare the scrollbars

		that._scrollbar('h');

		that._scrollbar('v');



		if (!that.zoomed) {

			that.scroller.style[transitionDuration] = '0';

			that._resetPos(400);

		}

	},



	scrollTo: function (x, y, time, relative) {

		var that = this,

			step = x,

			i, l;



		that.stop();



		if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];

		

		for (i=0, l=step.length; i<l; i++) {

			if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }

			that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });

		}



		that._startAni();

	},



	scrollToElement: function (el, time) {

		var that = this, pos;

		el = el.nodeType ? el : that.scroller.querySelector(el);

		if (!el) return;



		pos = that._offset(el);

		pos.left += that.wrapperOffsetLeft;

		pos.top += that.wrapperOffsetTop;



		pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;

		pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;

		time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time;



		that.scrollTo(pos.left, pos.top, time);

	},



	scrollToPage: function (pageX, pageY, time) {

		var that = this, x, y;

		

		time = time === undefined ? 400 : time;



		if (that.options.onScrollStart) that.options.onScrollStart.call(that);



		if (that.options.snap) {

			pageX = pageX == 'next' ? that.currPageX+1 : pageX == 'prev' ? that.currPageX-1 : pageX;

			pageY = pageY == 'next' ? that.currPageY+1 : pageY == 'prev' ? that.currPageY-1 : pageY;



			pageX = pageX < 0 ? 0 : pageX > that.pagesX.length-1 ? that.pagesX.length-1 : pageX;

			pageY = pageY < 0 ? 0 : pageY > that.pagesY.length-1 ? that.pagesY.length-1 : pageY;



			that.currPageX = pageX;

			that.currPageY = pageY;

			x = that.pagesX[pageX];

			y = that.pagesY[pageY];

		} else {

			x = -that.wrapperW * pageX;

			y = -that.wrapperH * pageY;

			if (x < that.maxScrollX) x = that.maxScrollX;

			if (y < that.maxScrollY) y = that.maxScrollY;

		}



		that.scrollTo(x, y, time);

	},



	disable: function () {

		this.stop();

		this._resetPos(0);

		this.enabled = false;



		// If disabled after touchstart we make sure that there are no left over events

		this._unbind(MOVE_EV, window);

		this._unbind(END_EV, window);

		this._unbind(CANCEL_EV, window);

	},

	

	enable: function () {

		this.enabled = true;

	},

	

	stop: function () {

		if (this.options.useTransition) this._unbind(TRNEND_EV);

		else cancelFrame(this.aniTime);

		this.steps = [];

		this.moved = false;

		this.animating = false;

	},

	

	zoom: function (x, y, scale, time) {

		var that = this,

			relScale = scale / that.scale;



		if (!that.options.useTransform) return;



		that.zoomed = true;

		time = time === undefined ? 200 : time;

		x = x - that.wrapperOffsetLeft - that.x;

		y = y - that.wrapperOffsetTop - that.y;

		that.x = x - x * relScale + that.x;

		that.y = y - y * relScale + that.y;



		that.scale = scale;

		that.refresh();



		that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;

		that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;



		that.scroller.style[transitionDuration] = time + 'ms';

		that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px) scale(' + scale + ')' + translateZ;

		that.zoomed = false;

	},

	

	isReady: function () {

		return !this.moved && !this.zoomed && !this.animating;

	}

};



function prefixStyle (style) {

	if ( vendor === '' ) return style;



	style = style.charAt(0).toUpperCase() + style.substr(1);

	return vendor + style;

}



dummyStyle = null;	// for the sake of it



if (typeof exports !== 'undefined') exports.iScroll = iScroll;

else window.iScroll = iScroll;



})(window, document);

