动态的绑定事件addEventListener方法的使用

复制代码代码如下:
<script language = "javascript" type = "text/javascript">
function test（）{
window.alert（"你投了一次票"）;
//解除绑定事件
document.getElementById（"but1"）.removeEventListener（"onclick",test）;
}
</script>
<body>
<input id = "but1" type = "button" value = "投票" />
<script language = "javascript" type = "text/javascript">
//动态绑定事件可以取消绑定
document.getElementById（"but1"）.addEventListener（"onclick",test）;
</script>
</body>