IE及IE6浏览器中判断JS文件加载成功失败的方法

      if(ie && ie < 9) {
        vbs = doc.createElement(\'script\');
        vbs.language = \'vbscript\';
        vbs.src = file;
       saveErrorHandle = win.onerror;
       win.onerror = function() {
         load();
         win.onerror = saveErrorHandle;
         return true;
       };
       setTimeout(function(){
         ref.parentNode.insertBefore(vbs, ref);
       }, 0);
     } else {
       load();
     }