js 事件传递参数

attachEvt:function(target, eventName, handler, argsObject) 	{  	    var eventHandler = handler;  	    if(argsObject)  	    {  	        eventHander = function(e)  	        {  	            handler.call(argsObject, e);  	        }  	    }  	    if(window.attachEvent)//IE  	        target.attachEvent("on" + eventName, eventHander );  	    else//FF  	        target.addEventListener(eventName, eventHander, false);  	}
attachEvt(img,"click",this.fun,param);