event 兼容firefox和ie

转:

 

 

function   out()   
  {   
    var e = getEvent();
  var   oObj   =   e.srcElement   ||   e.target;   


  
  var   oTr   =   oObj.parentNode;   
  if(!oTr.tag)   
  oTr.className   =   "out";   
 
  }   
    
    
  function getEvent()
    {     //同时兼容ie和ff的写法
         if(document.all)    return window.event;       
         func=getEvent.caller;           
         while(func!=null){   
             var arg0=func.arguments[0];
             if(arg0){
                 if((arg0.constructor==Event || arg0.constructor ==MouseEvent) || (typeof(arg0)=="object" && arg0.preventDefault && arg0.stopPropagation)){   
                     return arg0;
                 }
             }
             func=func.caller;
         }
         return null;
    }