function loadScript(url, callback, dataName, dataDeps){
       var script = document.createElement('script');
       script.type = 'text/javascript';
       if(dataName){
           script.setAttribute("data-name",dataName);
       }
       if(dataDeps){
           script.setAttribute("data-deps",dataDeps);
       }
       if
 
(script.readyState){//IE
           script.onreadystatechange = function(){
               if(script.readyState == 'loaded' || script.readyState == 'complete'){
                   script.onreadystatechange = null;
                   callback()
               }
           }
       }else{//Other
           script.onload = function
 
(){
               callback();    
           }
       }
       script.src = url;
       document.getElementsByTagName('head')[0].appendChild(script);
   }

當頁面中動態載入多個有關聯的JavaScript檔案時，我們可以將其串聯起來，保證順序。

loadScript('file1.js',function(){
    loadScript('file2.js',function(){
        ...
    });
});