var grayscale=(function(){var config={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(new RegExp('https?://(?!'+window.location.hostname+')')).test(url)},data=(function(){var cache=[0],expando='data'+(+new Date());return function(elem){var cacheIndex=elem[expando],nextCacheIndex=cache.length;if(!cacheIndex){cacheIndex=elem[expando]=nextCacheIndex;cache[cacheIndex]={}}return cache[cacheIndex]}})(),desatIMG=function(img,prepare,realEl){var canvas=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;var y=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(var x=0;x<width;x++){var i=(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(var y=0;y<height;y++){for(var x=0;x<width;x++){var i=(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);return canvas},getStyle=function(el,prop){var style=document.defaultView&&document.defaultView.getComputedStyle?document.defaultView.getComputedStyle(el,null)[prop]:el.currentStyle[prop];if(style&&/^#[A-F0-9]/i.test(style)){var hex=style.match(/[A-F0-9]{2}/ig);style='rgb('+parseInt(hex[0],16)+','+parseInt(hex[1],16)+','+parseInt(hex[2],16)+')'}return style},RGBtoGRAYSCALE=function(r,g,b){return parseInt((0.2125*r)+(0.7154*g)+(0.0721*b),10)},getAllNodes=function(context){var all=Array.prototype.slice.call(context.getElementsByTagName('*'));all.unshift(context);return all};var init=function(context){if(context&&context[0]&&context.length&&context[0].nodeName){var allContexts=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}var all=getAllNodes(context),i=-1,len=all.length;while(++i<len){var cur=all[i];if(cur.nodeName.toLowerCase()==='img'){var src=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(var pIndex=0,pLen=config.colorProps.length;pIndex<pLen;pIndex++){var prop=config.colorProps[pIndex],style=getStyle(cur,prop);if(!style){continue}if(cur.style[prop]){data(cur)[prop]=style}if(style.substring(0,4)==='rgb('){var monoRGB=RGBtoGRAYSCALE.apply(null,style.match(/\d+/g));cur.style[prop]=style='rgb('+monoRGB+','+monoRGB+','+monoRGB+')';continue}if(style.indexOf('url(')>-1){var urlPatt=/\(['"]?(.+?)['"]?\)/,url=style.match(urlPatt)[1];if(isExternal(url)){config.externalImageHandler.init(cur,url);data(cur).externalBG=true;continue}try{var imgSRC=data(cur).BGdataURL||(function(){var temp=document.createElement('img');temp.src=url;return desatIMG(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){var allContexts=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}var all=getAllNodes(context),i=-1,len=all.length;while(++i<len){var cur=all[i];if(cur.nodeName.toLowerCase()==='img'){var src=cur.getAttribute('src');if(isExternal(src)){config.externalImageHandler.reset(cur,src)}cur.src=data(cur).realSRC||src}else{for(var pIndex=0,pLen=config.colorProps.length;pIndex<pLen;pIndex++){if(data(cur).externalBG){config.externalImageHandler.reset(cur)}var prop=config.colorProps[pIndex];cur.style[prop]=data(cur)[prop]||''}}}};init.prepare=function(context){if(context&&context[0]&&context.length&&context[0].nodeName){var allContexts=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}var all=getAllNodes(context),i=-1,len=all.length;while(++i<len){var cur=all[i];if(data(cur).skip){return}if(cur.nodeName.toLowerCase()==='img'){if(cur.getAttribute('src')&&!isExternal(cur.src)){desatIMG(cur,true)}}else{var style=getStyle(cur,'backgroundImage');if(style.indexOf('url(')>-1){var urlPatt=/\(['"]?(.+?)['"]?\)/,url=style.match(urlPatt)[1];if(!isExternal(url)){var temp=document.createElement('img');temp.src=url;desatIMG(temp,true,cur)}}}}};return init})();