动态加载CSS，JS文件

 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")