//跨浏览器事件处理程序 var eventutil={ //添加句柄 addHandler:function(element,type,handler){ if(element.addEventListener){ element.addEventListener(type,handler,false); } else if(element.attachEvent){ element.attachEvent('on'+type,handler); } else{ element['on'+type]=handler; } }, //删除句柄 removeHandler:function(element,type,handler){ if(element.addEventListener){ element.removeEventListener(type,handler,false); } else if(element.attachEvent){ element.detachEvent('on'+type,handler); } else{ element['on'+type]=null; } } } eventutil.addHandler(btn3,"click",showMessage); eventutil.removeHandler(btn3,"click",showMessage); </script> </body> </html>

事件处理程序