vargrayscale=(function(){varconfig={colorProps:['color','backgroundColor','borderBottomColor','borderTopColor','borderLeftColor','borderRightColor','backgroundImage'],externalImageHandler:{init:function(el,src){if(el.nodeName.toLowerCase()==='img'){}else{data(el).backgroundImageSRC=src;el.style.backgroundImage='';}},reset:function(el){if(el.nodeName.toLowerCase()==='img'){}else{el.style.backgroundImage='url('+(data(el).backgroundImageSRC||'')+')';}}}},log=function(){try{window.console.log.apply(console,arguments);}catch(e){};},isExternal=function(url){return(newRegExp('https?://(?!'+window.location.hostname+')')).test(url);},data=(function(){varcache=[0],expando='data'+(+newDate());returnfunction(elem){varcacheIndex=elem[expando],nextCacheIndex=cache.length;if(!cacheIndex){cacheIndex=elem[expando]=nextCacheIndex;cache[cacheIndex]={};}returncache[cacheIndex];};})(),desatIMG=function(img,prepare,realEl){				varcanvas=document.createElement('canvas'),context=canvas.getContext('2d'),height=img.naturalHeight||img.offsetHeight||img.height,width=img.naturalWidth||img.offsetWidth||img.width,imgData;canvas.height=height;canvas.width=width;context.drawImage(img,0,0);try{imgData=context.getImageData(0,0,width,height);}catch(e){}if(prepare){desatIMG.preparing=true;vary=0;(function(){if(!desatIMG.preparing){return;}if(y===height){context.putImageData(imgData,0,0,0,0,width,height);realEl?(data(realEl).BGdataURL=canvas.toDataURL()):(data(img).dataURL=canvas.toDataURL())}for(varx=0;x<width;x++){vari=(y*width+x)*4;imgData.data[i]=imgData.data[i+1]=imgData.data[i+2]=RGBtoGRAYSCALE(imgData.data[i],imgData.data[i+1],imgData.data[i+2]);}y++;setTimeout(arguments.callee,0);})();return;}else{desatIMG.preparing=false;}for(vary=0;y<height;y++){for(varx=0;x<width;x++){vari=(y*width+x)*4;imgData.data[i]=imgData.data[i+1]=imgData.data[i+2]=RGBtoGRAYSCALE(imgData.data[i],imgData.data[i+1],imgData.data[i+2]);}}context.putImageData(imgData,0,0,0,0,width,height);returncanvas;},getStyle=function(el,prop){varstyle=document.defaultView&&document.defaultView.getComputedStyle?document.defaultView.getComputedStyle(el,null)[prop]:el.currentStyle[prop];if(style&&/^#[A-F0-9]/i.test(style)){varhex=style.match(/[A-F0-9]{2}/ig);style='rgb('+parseInt(hex[0],16)+','+parseInt(hex[1],16)+','+parseInt(hex[2],16)+')';}returnstyle;},RGBtoGRAYSCALE=function(r,g,b){returnparseInt((0.2125*r)+(0.7154*g)+(0.0721*b),10);},getAllNodes=function(context){varall=Array.prototype.slice.call(context.getElementsByTagName('*'));all.unshift(context);returnall;};varinit=function(context){if(context&&context[0]&&context.length&&context[0].nodeName){varallContexts=Array.prototype.slice.call(context),cIndex=-1,cLen=allContexts.length;while(++cIndex<cLen){init.call(this,allContexts[cIndex]);}return;}context=context||document.documentElement;if(!document.createElement('canvas').getContext){context.style.filter='progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)';context.style.zoom=1;return;}varall=getAllNodes(context),i=-1,len=all.length;while(++i<len){varcur=all[i];if(cur.nodeName.toLowerCase()==='img'){varsrc=cur.getAttribute('src');if(!src){continue;}if(isExternal(src)){config.externalImageHandler.init(cur,src);}else{data(cur).realSRC=src;try{cur.src=data(cur).dataURL||desatIMG(cur).toDataURL();}catch(e){config.externalImageHandler.init(cur,src);}}}else{for(varpIndex=0,pLen=config.colorProps.length;pIndex<pLen;pIndex++){varprop=config.colorProps[pIndex],style=getStyle(cur,prop);if(!style){continue;}if(cur.style[prop]){data(cur)[prop]=style;}if(style.substring(0,4)==='rgb('){varmonoRGB=RGBtoGRAYSCALE.apply(null,style.match(/\d+/g));cur.style[prop]=style='rgb('+monoRGB+','+monoRGB+','+monoRGB+')';continue;}if(style.indexOf('url(')>-1){varurlPatt=/\(['"]?(.+?)['"]?\)/,url=style.match(urlPatt)[1];if(isExternal(url)){config.externalImageHandler.init(cur,url);data(cur).externalBG=true;continue;}try{varimgSRC=data(cur).BGdataURL||(function(){vartemp=document.createElement('img');temp.src=url;returndesatIMG(temp).toDataURL();})();cur.style[prop]=style.replace(urlPatt,function(_,url){return'('+imgSRC+')';});}catch(e){config.externalImageHandler.init(cur,url);}}}}}};init.reset=function(context){if(context&&context[0]&&context.length&&context[0].nodeName){varallContexts=Array.prototype.slice.call(context),cIndex=-1,cLen=allContexts.length;while(++cIndex<cLen){init.reset.call(this,allContexts[cIndex]);}return;}context=context||document.documentElement;if(!document.createElement('canvas').getContext){context.style.filter='progid:DXImageTransform.Microsoft.BasicImage(grayscale=0)';return;}varall=getAllNodes(context),i=-1,len=all.length;while(++i<len){varcur=all[i];if(cur.nodeName.toLowerCase()==='img'){varsrc=cur.getAttribute('src');if(isExternal(src)){config.externalImageHandler.reset(cur,src);}cur.src=data(cur).realSRC||src;}else{for(varpIndex=0,pLen=config.colorProps.length;pIndex<pLen;pIndex++){if(data(cur).externalBG){config.externalImageHandler.reset(cur);}varprop=config.colorProps[pIndex];cur.style[prop]=data(cur)[prop]||'';}}}};init.prepare=function(context){if(context&&context[0]&&context.length&&context[0].nodeName){varallContexts=Array.prototype.slice.call(context),cIndex=-1,cLen=allContexts.length;while(++cIndex<cLen){init.prepare.call(null,allContexts[cIndex]);}return;}		context=context||document.documentElement;if(!document.createElement('canvas').getContext){return;}varall=getAllNodes(context),i=-1,len=all.length;while(++i<len){varcur=all[i];if(data(cur).skip){return;}if(cur.nodeName.toLowerCase()==='img'){if(cur.getAttribute('src')&&!isExternal(cur.src)){desatIMG(cur,true);}}else{varstyle=getStyle(cur,'backgroundImage');if(style.indexOf('url(')>-1){varurlPatt=/\(['"]?(.+?)['"]?\)/,url=style.match(urlPatt)[1];if(!isExternal(url)){vartemp=document.createElement('img');temp.src=url;desatIMG(temp,true,cur);}}}}};returninit;})();