监听事件简单封装成一个方法
<style> #box{ width: 200px; height: 200px; background-color: #aaf; } </style> <script> window.onload = function(){ function bind(obj,ev,fn){ obj.attachEvent ? obj.attachEvent( 'on' + ev , fn ) : obj.addEventListener( ev , fn , false ) } var oBox = document.querySelector('#box') oBox.onclick = function(){ alert(1) } bind(oBox,'mouseover',function(){alert(2)}) } </script> </head> <body> <div id="box"></div> </body>