/**
 *
 * Find more about the scrolling function at
 * http://cubiq.org/iscroll
 *
 * Copyright (c) 2010 Matteo Spinelli, http://cubiq.org/
 * Released under MIT license
 * http://cubiq.org/dropbox/mit-license.txt
 *
 * Version 3.7.1 - Last updated: 2010.10.08
 *
 */
(function(){function iScroll(el,options){var that=this,i;that.element=typeof el=='object'?el:document.getElementById(el);that.wrapper=that.element.parentNode;that.element.style.webkitTransitionProperty='-webkit-transform';that.element.style.webkitTransitionTimingFunction='cubic-bezier(0,0,0.25,1)';that.element.style.webkitTransitionDuration='0';that.element.style.webkitTransform=translateOpen+'0,0'+translateClose;that.options={bounce:has3d,momentum:has3d,checkDOMChanges:true,topOnDOMChanges:false,hScrollbar:has3d,vScrollbar:has3d,fadeScrollbar:isIthing||!isTouch,shrinkScrollbar:isIthing||!isTouch,desktopCompatibility:false,overflow:'auto',snap:false,bounceLock:false,scrollbarColor:'rgba(0,0,0,0.5)',onScrollEnd:function(){}};if(typeof options=='object'){for(i in options){that.options[i]=options[i];}}
if(that.options.desktopCompatibility){that.options.overflow='hidden';}
that.onScrollEnd=that.options.onScrollEnd;delete that.options.onScrollEnd;that.wrapper.style.overflow=that.options.overflow;that.refresh();window.addEventListener('onorientationchange'in window?'orientationchange':'resize',that,false);if(isTouch||that.options.desktopCompatibility){that.element.addEventListener(START_EVENT,that,false);that.element.addEventListener(MOVE_EVENT,that,false);that.element.addEventListener(END_EVENT,that,false);}
if(that.options.checkDOMChanges){that.element.addEventListener('DOMSubtreeModified',that,false);}}
iScroll.prototype={x:0,y:0,enabled:true,handleEvent:function(e){var that=this;switch(e.type){case START_EVENT:that.touchStart(e);break;case MOVE_EVENT:that.touchMove(e);break;case END_EVENT:that.touchEnd(e);break;case'webkitTransitionEnd':that.transitionEnd();break;case'orientationchange':case'resize':that.refresh();break;case'DOMSubtreeModified':that.onDOMModified(e);break;}},onDOMModified:function(e){var that=this;if(e.target.parentNode!=that.element){return;}
setTimeout(function(){that.refresh();},0);if(that.options.topOnDOMChanges&&(that.x!=0||that.y!=0)){that.scrollTo(0,0,'0');}},refresh:function(){var that=this,resetX=that.x,resetY=that.y,snap;that.scrollWidth=that.wrapper.clientWidth;that.scrollHeight=that.wrapper.clientHeight;that.scrollerWidth=that.element.offsetWidth;that.scrollerHeight=that.element.offsetHeight;that.maxScrollX=that.scrollWidth-that.scrollerWidth;that.maxScrollY=that.scrollHeight-that.scrollerHeight;that.directionX=0;that.directionY=0;if(that.scrollX){if(that.maxScrollX>=0){resetX=0;}else if(that.x<that.maxScrollX){resetX=that.maxScrollX;}}
if(that.scrollY){if(that.maxScrollY>=0){resetY=0;}else if(that.y<that.maxScrollY){resetY=that.maxScrollY;}}
if(that.options.snap){that.maxPageX=-Math.floor(that.maxScrollX/that.scrollWidth);that.maxPageY=-Math.floor(that.maxScrollY/that.scrollHeight);snap=that.snap(resetX,resetY);resetX=snap.x;resetY=snap.y;}
if(resetX!=that.x||resetY!=that.y){that.setTransitionTime('0');that.setPosition(resetX,resetY,true);}
that.scrollX=that.scrollerWidth>that.scrollWidth;that.scrollY=!that.options.bounceLock&&!that.scrollX||that.scrollerHeight>that.scrollHeight;if(that.options.hScrollbar&&that.scrollX){that.scrollBarX=that.scrollBarX||new scrollbar('horizontal',that.wrapper,that.options.fadeScrollbar,that.options.shrinkScrollbar,that.options.scrollbarColor);that.scrollBarX.init(that.scrollWidth,that.scrollerWidth);}else if(that.scrollBarX){that.scrollBarX=that.scrollBarX.remove();}
if(that.options.vScrollbar&&that.scrollY&&that.scrollerHeight>that.scrollHeight){that.scrollBarY=that.scrollBarY||new scrollbar('vertical',that.wrapper,that.options.fadeScrollbar,that.options.shrinkScrollbar,that.options.scrollbarColor);that.scrollBarY.init(that.scrollHeight,that.scrollerHeight);}else if(that.scrollBarY){that.scrollBarY=that.scrollBarY.remove();}},setPosition:function(x,y,hideScrollBars){var that=this;that.x=x;that.y=y;that.element.style.webkitTransform=translateOpen+that.x+'px,'+that.y+'px'+translateClose;if(!hideScrollBars){if(that.scrollBarX){that.scrollBarX.setPosition(that.x);}
if(that.scrollBarY){that.scrollBarY.setPosition(that.y);}}},setTransitionTime:function(time){var that=this;time=time||'0';that.element.style.webkitTransitionDuration=time;if(that.scrollBarX){that.scrollBarX.bar.style.webkitTransitionDuration=time;that.scrollBarX.wrapper.style.webkitTransitionDuration=has3d&&that.options.fadeScrollbar?'300ms':'0';}
if(that.scrollBarY){that.scrollBarY.bar.style.webkitTransitionDuration=time;that.scrollBarY.wrapper.style.webkitTransitionDuration=has3d&&that.options.fadeScrollbar?'300ms':'0';}},touchStart:function(e){var that=this,matrix;if(!that.enabled){return;}
e.preventDefault();e.stopPropagation();that.scrolling=true;that.moved=false;that.distX=0;that.distY=0;that.setTransitionTime('0');if(that.options.momentum||that.options.snap){matrix=new WebKitCSSMatrix(window.getComputedStyle(that.element).webkitTransform);if(matrix.e!=that.x||matrix.f!=that.y){document.removeEventListener('webkitTransitionEnd',that,false);that.setPosition(matrix.e,matrix.f);that.moved=true;}}
that.touchStartX=isTouch?e.changedTouches[0].pageX:e.pageX;that.scrollStartX=that.x;that.touchStartY=isTouch?e.changedTouches[0].pageY:e.pageY;that.scrollStartY=that.y;that.scrollStartTime=e.timeStamp;that.directionX=0;that.directionY=0;},touchMove:function(e){if(!this.scrolling){return;}
var that=this,pageX=isTouch?e.changedTouches[0].pageX:e.pageX,pageY=isTouch?e.changedTouches[0].pageY:e.pageY,leftDelta=that.scrollX?pageX-that.touchStartX:0,topDelta=that.scrollY?pageY-that.touchStartY:0,newX=that.x+leftDelta,newY=that.y+topDelta;e.stopPropagation();that.touchStartX=pageX;that.touchStartY=pageY;if(newX>=0||newX<that.maxScrollX){newX=that.options.bounce?Math.round(that.x+leftDelta / 3):(newX>=0||that.maxScrollX>=0)?0:that.maxScrollX;}
if(newY>=0||newY<that.maxScrollY){newY=that.options.bounce?Math.round(that.y+topDelta / 3):(newY>=0||that.maxScrollY>=0)?0:that.maxScrollY;}
if(that.distX+that.distY>5){if(that.distX-3>that.distY){newY=that.y;topDelta=0;}else if(that.distY-3>that.distX){newX=that.x;leftDelta=0;}
that.setPosition(newX,newY);that.moved=true;that.directionX=leftDelta>0?-1:1;that.directionY=topDelta>0?-1:1;}else{that.distX+=Math.abs(leftDelta);that.distY+=Math.abs(topDelta);}},touchEnd:function(e){if(!this.scrolling){return;}
var that=this,time=e.timeStamp-that.scrollStartTime,point=isTouch?e.changedTouches[0]:e,target,ev,momentumX,momentumY,newDuration=0,newPositionX=that.x,newPositionY=that.y,snap;that.scrolling=false;if(!that.moved){that.resetPosition();if(isTouch){target=point.target;while(target.nodeType!=1){target=target.parentNode;}
ev=document.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);}
return;}
if(!that.options.snap&&time>250){that.resetPosition();return;}
if(that.options.momentum){momentumX=that.scrollX===true?that.momentum(that.x-that.scrollStartX,time,that.options.bounce?-that.x+that.scrollWidth/5:-that.x,that.options.bounce?that.x+that.scrollerWidth-that.scrollWidth+that.scrollWidth/5:that.x+that.scrollerWidth-that.scrollWidth):{dist:0,time:0};momentumY=that.scrollY===true?that.momentum(that.y-that.scrollStartY,time,that.options.bounce?-that.y+that.scrollHeight/5:-that.y,that.options.bounce?(that.maxScrollY<0?that.y+that.scrollerHeight-that.scrollHeight:0)+that.scrollHeight/5:that.y+that.scrollerHeight-that.scrollHeight):{dist:0,time:0};newDuration=Math.max(Math.max(momentumX.time,momentumY.time),1);newPositionX=that.x+momentumX.dist;newPositionY=that.y+momentumY.dist;}
if(that.options.snap){snap=that.snap(newPositionX,newPositionY);newPositionX=snap.x;newPositionY=snap.y;newDuration=Math.max(snap.time,newDuration);}
that.scrollTo(newPositionX,newPositionY,newDuration+'ms');},transitionEnd:function(){var that=this;document.removeEventListener('webkitTransitionEnd',that,false);that.resetPosition();},resetPosition:function(){var that=this,resetX=that.x,resetY=that.y;if(that.x>=0){resetX=0;}else if(that.x<that.maxScrollX){resetX=that.maxScrollX;}
if(that.y>=0||that.maxScrollY>0){resetY=0;}else if(that.y<that.maxScrollY){resetY=that.maxScrollY;}
if(resetX!=that.x||resetY!=that.y){that.scrollTo(resetX,resetY);}else{if(that.moved){that.onScrollEnd();that.moved=false;}
if(that.scrollBarX){that.scrollBarX.hide();}
if(that.scrollBarY){that.scrollBarY.hide();}}},snap:function(x,y){var that=this,time;if(that.directionX>0){x=Math.floor(x/that.scrollWidth);}else if(that.directionX<0){x=Math.ceil(x/that.scrollWidth);}else{x=Math.round(x/that.scrollWidth);}
that.pageX=-x;x=x*that.scrollWidth;if(x>0){x=that.pageX=0;}else if(x<that.maxScrollX){that.pageX=that.maxPageX;x=that.maxScrollX;}
if(that.directionY>0){y=Math.floor(y/that.scrollHeight);}else if(that.directionY<0){y=Math.ceil(y/that.scrollHeight);}else{y=Math.round(y/that.scrollHeight);}
that.pageY=-y;y=y*that.scrollHeight;if(y>0){y=that.pageY=0;}else if(y<that.maxScrollY){that.pageY=that.maxPageY;y=that.maxScrollY;}
time=Math.round(Math.max(Math.abs(that.x-x)/ that.scrollWidth*500,Math.abs(that.y-y)/ that.scrollHeight*500));return{x:x,y:y,time:time};},scrollTo:function(destX,destY,runtime){var that=this;if(that.x==destX&&that.y==destY){that.resetPosition();return;}
that.moved=true;that.setTransitionTime(runtime||'350ms');that.setPosition(destX,destY);if(runtime==='0'||runtime=='0s'||runtime=='0ms'){that.resetPosition();}else{document.addEventListener('webkitTransitionEnd',that,false);}},scrollToPage:function(pageX,pageY,runtime){var that=this,snap;if(!that.options.snap){that.pageX=-Math.round(that.x / that.scrollWidth);that.pageY=-Math.round(that.y / that.scrollHeight);}
if(pageX=='next'){pageX=++that.pageX;}else if(pageX=='prev'){pageX=--that.pageX;}
if(pageY=='next'){pageY=++that.pageY;}else if(pageY=='prev'){pageY=--that.pageY;}
pageX=-pageX*that.scrollWidth;pageY=-pageY*that.scrollHeight;snap=that.snap(pageX,pageY);pageX=snap.x;pageY=snap.y;that.scrollTo(pageX,pageY,runtime||'500ms');},scrollToElement:function(el,runtime){el=typeof el=='object'?el:this.element.querySelector(el);if(!el){return;}
var that=this,x=that.scrollX?-el.offsetLeft:0,y=that.scrollY?-el.offsetTop:0;if(x>=0){x=0;}else if(x<that.maxScrollX){x=that.maxScrollX;}
if(y>=0){y=0;}else if(y<that.maxScrollY){y=that.maxScrollY;}
that.scrollTo(x,y,runtime);},momentum:function(dist,time,maxDistUpper,maxDistLower){var friction=2.5,deceleration=1.2,speed=Math.abs(dist)/ time*1000,newDist=speed*speed / friction / 1000,newTime=0;if(dist>0&&newDist>maxDistUpper){speed=speed*maxDistUpper / newDist / friction;newDist=maxDistUpper;}else if(dist<0&&newDist>maxDistLower){speed=speed*maxDistLower / newDist / friction;newDist=maxDistLower;}
newDist=newDist*(dist<0?-1:1);newTime=speed / deceleration;return{dist:Math.round(newDist),time:Math.round(newTime)};},destroy:function(full){var that=this;window.removeEventListener('onorientationchange'in window?'orientationchange':'resize',that,false);that.element.removeEventListener(START_EVENT,that,false);that.element.removeEventListener(MOVE_EVENT,that,false);that.element.removeEventListener(END_EVENT,that,false);document.removeEventListener('webkitTransitionEnd',that,false);if(that.options.checkDOMChanges){that.element.removeEventListener('DOMSubtreeModified',that,false);}
if(that.scrollBarX){that.scrollBarX=that.scrollBarX.remove();}
if(that.scrollBarY){that.scrollBarY=that.scrollBarY.remove();}
if(full){that.wrapper.parentNode.removeChild(that.wrapper);}
return null;}};function scrollbar(dir,wrapper,fade,shrink,color){var that=this,doc=document;that.dir=dir;that.fade=fade;that.shrink=shrink;that.uid=++uid;that.bar=doc.createElement('div');that.bar.style.cssText='position:absolute;top:0;left:0;-webkit-transition-timing-function:cubic-bezier(0,0,0.25,1);pointer-events:none;-webkit-transition-duration:0;-webkit-transition-delay:0;-webkit-transition-property:-webkit-transform;z-index:10;background:'+color+';'+'-webkit-transform:'+translateOpen+'0,0'+translateClose+';'+
(dir=='horizontal'?'-webkit-border-radius:3px 2px;min-width:6px;min-height:5px':'-webkit-border-radius:2px 3px;min-width:5px;min-height:6px');that.wrapper=doc.createElement('div');that.wrapper.style.cssText='-webkit-mask:-webkit-canvas(scrollbar'+that.uid+that.dir+');position:absolute;z-index:10;pointer-events:none;overflow:hidden;opacity:0;-webkit-transition-duration:'+(fade?'300ms':'0')+';-webkit-transition-delay:0;-webkit-transition-property:opacity;'+
(that.dir=='horizontal'?'bottom:2px;left:2px;right:7px;height:5px':'top:2px;right:2px;bottom:7px;width:5px;');that.wrapper.appendChild(that.bar);wrapper.appendChild(that.wrapper);}
scrollbar.prototype={init:function(scroll,size){var that=this,doc=document,pi=Math.PI,ctx;if(that.dir=='horizontal'){if(that.maxSize!=that.wrapper.offsetWidth){that.maxSize=that.wrapper.offsetWidth;ctx=doc.getCSSCanvasContext("2d","scrollbar"+that.uid+that.dir,that.maxSize,5);ctx.fillStyle="rgb(0,0,0)";ctx.beginPath();ctx.arc(2.5,2.5,2.5,pi/2,-pi/2,false);ctx.lineTo(that.maxSize-2.5,0);ctx.arc(that.maxSize-2.5,2.5,2.5,-pi/2,pi/2,false);ctx.closePath();ctx.fill();}}else{if(that.maxSize!=that.wrapper.offsetHeight){that.maxSize=that.wrapper.offsetHeight;ctx=doc.getCSSCanvasContext("2d","scrollbar"+that.uid+that.dir,5,that.maxSize);ctx.fillStyle="rgb(0,0,0)";ctx.beginPath();ctx.arc(2.5,2.5,2.5,pi,0,false);ctx.lineTo(5,that.maxSize-2.5);ctx.arc(2.5,that.maxSize-2.5,2.5,0,pi,false);ctx.closePath();ctx.fill();}}
that.size=Math.max(Math.round(that.maxSize*that.maxSize / size),6);that.maxScroll=that.maxSize-that.size;that.toWrapperProp=that.maxScroll /(scroll-size);that.bar.style[that.dir=='horizontal'?'width':'height']=that.size+'px';},setPosition:function(pos){var that=this;if(that.wrapper.style.opacity!='1'){that.show();}
pos=Math.round(that.toWrapperProp*pos);if(pos<0){pos=that.shrink?pos+pos*3:0;if(that.size+pos<7){pos=-that.size+6;}}else if(pos>that.maxScroll){pos=that.shrink?pos+(pos-that.maxScroll)*3:that.maxScroll;if(that.size+that.maxScroll-pos<7){pos=that.size+that.maxScroll-6;}}
pos=that.dir=='horizontal'?translateOpen+pos+'px,0'+translateClose:translateOpen+'0,'+pos+'px'+translateClose;that.bar.style.webkitTransform=pos;},show:function(){if(has3d){this.wrapper.style.webkitTransitionDelay='0';}
this.wrapper.style.opacity='1';},hide:function(){if(has3d){this.wrapper.style.webkitTransitionDelay='350ms';}
this.wrapper.style.opacity='0';},remove:function(){this.wrapper.parentNode.removeChild(this.wrapper);return null;}};var has3d=('WebKitCSSMatrix'in window&&'m11'in new WebKitCSSMatrix()),isIthing=(/iphone|ipad/gi).test(navigator.appVersion),isTouch=('ontouchstart'in window),START_EVENT=isTouch?'touchstart':'mousedown',MOVE_EVENT=isTouch?'touchmove':'mousemove',END_EVENT=isTouch?'touchend':'mouseup',translateOpen='translate'+(has3d?'3d(':'('),translateClose=has3d?',0)':')',uid=0;window.iScroll=iScroll;})();