动态加载CSS，JS文件

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var Head = document.getElementsByTagName('head')[0],style = document.createElement('style'); //文件全部加载完成显示DOM function linkScriptDOMLoaded(parm){     style.innerHTML = 'body{display:none}';//动态加载文件造成样式表渲染变慢，为了防止DOM结构在样式表渲染完成前显示造成抖动，先隐藏body，样式表读完再显示     Head.insertBefore(style,Head.firstChild)     var linkScript, linckScriptCount = parm.length, currentIndex = 0;       for ( var i = 0 ; i < parm.length; i++ ){         if(/\.css[^\.]*$/.test(parm[i])) {             linkScript = document.createElement("link");             linkScript.type = "text/" + ("css");             linkScript.rel = "stylesheet";             linkScript.href = parm[i];         } else {             linkScript = document.createElement("script");             linkScript.type = "text/" + ("javascript");             linkScript.src = parm[i];         }         Head.insertBefore(linkScript, Head.lastChild)         linkScript.onload = linkScript.onerror = function(){             currentIndex++;             if(linckScriptCount == currentIndex){                 style.innerHTML = 'body{display:block}';                 Head.insertBefore(style,Head.lastChild)             }         }     }   } //异步加载css,js文件 function linkScript(parm, fn) {     var linkScript;     if(/\.css[^\.]*$/.test(parm)) {         linkScript = document.createElement("link");         linkScript.type = "text/" + ("css");         linkScript.rel = "stylesheet";         linkScript.href = parm;     } else {         linkScript = document.createElement("script");         linkScript.type = "text/" + ("javascript");         linkScript.src = parm;     }     Head.insertBefore(linkScript, Head.lastChild)     linkScript.onload = linkScript.onerror = function() {         if(fn) fn()     } }       linkScriptDOMLoaded([     "/content/bootstrap/assets/css/style.css",     "/content/bootstrap/assets/css/bootstrap.css",     "/content/bootstrap/assets/js/footable/css/footable.standalone.css" ]) linkScript("/content/bootstrap/assets/css/entypo-icon.css") linkScript("/content/bootstrap/assets/css/font-awesome.css")