<body><div> <input type="button" id="btn3" value="按钮" /></div><script> var eventUtil={ addHandel:function(element,type,handel){ if(element.addEventListener){ element.addEventListener(type,handel,false); }else if(element.attachEvent){ element.attacheEvent("on"+type,handel); }else{ element["on"+type]=handel; } }, removeHandel:function(element,type,handel){ if(element.removeEventListener){ element.removeEventListener(type,handel,false); }else if(element.detachEvent){ element.detachEvent("on"+type,handel); }else{ element["on"+type]=null; } } }; eventUtil.addHandel(btn3，click,function(){ alert("hello"); }) </script></body>
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