(function(){var defaultOptions={frameRate:150,animationTime:400,stepSize:120,pulseAlgorithm:true,pulseScale:4,pulseNormalize:1,accelerationDelta:20,accelerationMax:1,keyboardSupport:true,arrowScroll:50,touchpadSupport:true,fixedBackground:true,excluded:''};var options=defaultOptions;var isExcluded=false;var isFrame=false;var direction={x:0,y:0};var initDone=false;var root=document.documentElement;var activeElement;var observer;var deltaBuffer=[];var isMac=/^Mac/.test(navigator.platform);var key={left:37,up:38,right:39,down:40,spacebar:32,pageup:33,pagedown:34,end:35,home:36};var options=defaultOptions;function initTest(){if(options.keyboardSupport){addEvent('keydown',keydown);}}function init(){if(initDone||!document.body)return;initDone=true;var body=document.body;var html=document.documentElement;var windowHeight=window.innerHeight;var scrollHeight=body.scrollHeight;root=(document.compatMode.indexOf('CSS')>=0)?html:body;activeElement=body;initTest();if(top!=self){isFrame=true;}else if(scrollHeight>windowHeight&&(body.offsetHeight<=windowHeight||html.offsetHeight<=windowHeight)){var fullPageElem=document.createElement('div');fullPageElem.style.cssText='position:absolute; z-index:-10000; '+'top:0; left:0; right:0; height:'+root.scrollHeight+'px';document.body.appendChild(fullPageElem);var pendingRefresh;var refresh=function(){if(pendingRefresh)return;pendingRefresh=setTimeout(function(){if(isExcluded)return;fullPageElem.style.height='0';fullPageElem.style.height=root.scrollHeight+'px';pendingRefresh=null;},500);};setTimeout(refresh,10);var config={attributes:true,childList:true,characterData:false};observer=new MutationObserver(refresh);observer.observe(body,config);if(root.offsetHeight<=windowHeight){var clearfix=document.createElement('div');clearfix.style.clear='both';body.appendChild(clearfix);}}if(!options.fixedBackground&&!isExcluded){body.style.backgroundAttachment='scroll';html.style.backgroundAttachment='scroll';}}function cleanup(){observer&&observer.disconnect();removeEvent(wheelEvent,wheel);removeEvent('mousedown',mousedown);removeEvent('keydown',keydown);}var que=[];var pending=false;var lastScroll=Date.now();function scrollArray(elem,left,top){directionCheck(left,top);if(options.accelerationMax!=1){var now=Date.now();var elapsed=now-lastScroll;if(elapsed<options.accelerationDelta){var factor=(1+(50/elapsed))/2;if(factor>1){factor=Math.min(factor,options.accelerationMax);left*=factor;top*=factor;}}lastScroll=Date.now();}que.push({x:left,y:top,lastX:(left<0)?0.99:-0.99,lastY:(top<0)?0.99:-0.99,start:Date.now()});if(pending){return;}var scrollWindow=(elem===document.body);var step=function(time){var now=Date.now();var scrollX=0;var scrollY=0;for(var i=0;i<que.length;i++){var item=que[i];var elapsed=now-item.start;var finished=(elapsed>=options.animationTime);var position=(finished)?1:elapsed/options.animationTime;if(options.pulseAlgorithm){position=pulse(position);}var x=(item.x*position-item.lastX)>>0;var y=(item.y*position-item.lastY)>>0;scrollX+=x;scrollY+=y;item.lastX+=x;item.lastY+=y;if(finished){que.splice(i,1);i--;}}if(scrollWindow){window.scrollBy(scrollX,scrollY);}else{if(scrollX)elem.scrollLeft+=scrollX;if(scrollY)elem.scrollTop+=scrollY;}if(!left&&!top){que=[];}if(que.length){requestFrame(step,elem,(1000/options.frameRate+1));}else{pending=false;}};requestFrame(step,elem,0);pending=true;}function wheel(event){if(!initDone){init();}var target=event.target;var overflowing=overflowingAncestor(target);if(!overflowing||event.defaultPrevented||event.ctrlKey){return true;}if(isNodeName(activeElement,'embed')||(isNodeName(target,'embed')&&/\.pdf/i.test(target.src))||isNodeName(activeElement,'object')){return true;}var deltaX=-event.wheelDeltaX||event.deltaX||0;var deltaY=-event.wheelDeltaY||event.deltaY||0;if(isMac){if(event.wheelDeltaX&&isDivisible(event.wheelDeltaX,120)){deltaX=-120*(event.wheelDeltaX/Math.abs(event.wheelDeltaX));}if(event.wheelDeltaY&&isDivisible(event.wheelDeltaY,120)){deltaY=-120*(event.wheelDeltaY/Math.abs(event.wheelDeltaY));}}if(!deltaX&&!deltaY){deltaY=-event.wheelDelta||0;}if(event.deltaMode===1){deltaX*=40;deltaY*=40;}if(!options.touchpadSupport&&isTouchpad(deltaY)){return true;}if(Math.abs(deltaX)>1.2){deltaX*=options.stepSize/120;}if(Math.abs(deltaY)>1.2){deltaY*=options.stepSize/120;}scrollArray(overflowing,deltaX,deltaY);event.preventDefault();scheduleClearCache();}function keydown(event){var target=event.target;var modifier=event.ctrlKey||event.altKey||event.metaKey||(event.shiftKey&&event.keyCode!==key.spacebar);if(!document.contains(activeElement)){activeElement=document.activeElement;}var inputNodeNames=/^(textarea|select|embed|object)$/i;var buttonTypes=/^(button|submit|radio|checkbox|file|color|image)$/i;if(inputNodeNames.test(target.nodeName)||isNodeName(target,'input')&&!buttonTypes.test(target.type)||isNodeName(activeElement,'video')||isInsideYoutubeVideo(event)||target.isContentEditable||event.defaultPrevented||modifier){return true;}if((isNodeName(target,'button')||isNodeName(target,'input')&&buttonTypes.test(target.type))&&event.keyCode===key.spacebar){return true;}var shift,x=0,y=0;var elem=overflowingAncestor(activeElement);var clientHeight=elem.clientHeight;if(elem==document.body){clientHeight=window.innerHeight;}switch(event.keyCode){case key.up:y=-options.arrowScroll;break;case key.down:y=options.arrowScroll;break;case key.spacebar:shift=event.shiftKey?1:-1;y=-shift*clientHeight*0.9;break;case key.pageup:y=-clientHeight*0.9;break;case key.pagedown:y=clientHeight*0.9;break;case key.home:y=-elem.scrollTop;break;case key.end:var damt=elem.scrollHeight-elem.scrollTop-clientHeight;y=(damt>0)?damt+10:0;break;case key.left:x=-options.arrowScroll;break;case key.right:x=options.arrowScroll;break;default:return true;}scrollArray(elem,x,y);event.preventDefault();scheduleClearCache();}function mousedown(event){activeElement=event.target;}var uniqueID=(function(){var i=0;return function(el){return el.uniqueID||(el.uniqueID=i++);};})();var cache={};var clearCacheTimer;function scheduleClearCache(){clearTimeout(clearCacheTimer);clearCacheTimer=setInterval(function(){cache={};},1*1000);}function setCache(elems,overflowing){for(var i=elems.length;i--;)cache[uniqueID(elems[i])]=overflowing;return overflowing;}function overflowingAncestor(el){var elems=[];var body=document.body;var rootScrollHeight=root.scrollHeight;do{var cached=cache[uniqueID(el)];if(cached){return setCache(elems,cached);}elems.push(el);if(rootScrollHeight===el.scrollHeight){var topOverflowsNotHidden=overflowNotHidden(root)&&overflowNotHidden(body);var isOverflowCSS=topOverflowsNotHidden||overflowAutoOrScroll(root);if(isFrame&&isContentOverflowing(root)||!isFrame&&isOverflowCSS){return setCache(elems,getScrollRoot());}}else if(isContentOverflowing(el)&&overflowAutoOrScroll(el)){return setCache(elems,el);}}while(el=el.parentElement);}function isContentOverflowing(el){return(el.clientHeight+10<el.scrollHeight);}function overflowNotHidden(el){var overflow=getComputedStyle(el,'').getPropertyValue('overflow-y');return(overflow!=='hidden');}function overflowAutoOrScroll(el){var overflow=getComputedStyle(el,'').getPropertyValue('overflow-y');return(overflow==='scroll'||overflow==='auto');}function addEvent(type,fn){window.addEventListener(type,fn,false);}function removeEvent(type,fn){window.removeEventListener(type,fn,false);}function isNodeName(el,tag){return(el.nodeName||'').toLowerCase()===tag.toLowerCase();}function directionCheck(x,y){x=(x>0)?1:-1;y=(y>0)?1:-1;if(direction.x!==x||direction.y!==y){direction.x=x;direction.y=y;que=[];lastScroll=0;}}var deltaBufferTimer;if(window.localStorage&&localStorage.SS_deltaBuffer){deltaBuffer=localStorage.SS_deltaBuffer.split(',');}function isTouchpad(deltaY){if(!deltaY)return;if(!deltaBuffer.length){deltaBuffer=[deltaY,deltaY,deltaY];}deltaY=Math.abs(deltaY)
deltaBuffer.push(deltaY);deltaBuffer.shift();clearTimeout(deltaBufferTimer);deltaBufferTimer=setTimeout(function(){if(window.localStorage){localStorage.SS_deltaBuffer=deltaBuffer.join(',');}},1000);return!allDeltasDivisableBy(120)&&!allDeltasDivisableBy(100);}function isDivisible(n,divisor){return(Math.floor(n/divisor)==n/divisor);}function allDeltasDivisableBy(divisor){return(isDivisible(deltaBuffer[0],divisor)&&isDivisible(deltaBuffer[1],divisor)&&isDivisible(deltaBuffer[2],divisor));}function isInsideYoutubeVideo(event){var elem=event.target;var isControl=false;if(document.URL.indexOf('www.youtube.com/watch')!=-1){do{isControl=(elem.classList&&elem.classList.contains('html5-video-controls'));if(isControl)break;}while(elem=elem.parentNode);}return isControl;}var requestFrame=(function(){return(window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||function(callback,element,delay){window.setTimeout(callback,delay||(1000/60));});})();var MutationObserver=(window.MutationObserver||window.WebKitMutationObserver||window.MozMutationObserver);var getScrollRoot=(function(){var SCROLL_ROOT;return function(){if(!SCROLL_ROOT){var dummy=document.createElement('div');dummy.style.cssText='height:10000px;width:1px;';document.body.appendChild(dummy);var bodyScrollTop=document.body.scrollTop;var docElScrollTop=document.documentElement.scrollTop;window.scrollBy(0,1);if(document.body.scrollTop!=bodyScrollTop)(SCROLL_ROOT=document.body);else(SCROLL_ROOT=document.documentElement);window.scrollBy(0,-1);document.body.removeChild(dummy);}return SCROLL_ROOT;};})();function pulse_(x){var val,start,expx;x=x*options.pulseScale;if(x<1){val=x-(1-Math.exp(-x));}else{start=Math.exp(-1);x-=1;expx=1-Math.exp(-x);val=start+(expx*(1-start));}return val*options.pulseNormalize;}function pulse(x){if(x>=1)return 1;if(x<=0)return 0;if(options.pulseNormalize==1){options.pulseNormalize/=pulse_(1);}return pulse_(x);}var wheelEvent;if('onwheel'in document.createElement('div'))wheelEvent='wheel';else if('onmousewheel'in document.createElement('div'))wheelEvent='mousewheel';if(wheelEvent){addEvent(wheelEvent,wheel);addEvent('mousedown',mousedown);addEvent('load',init);}})();