<html>
<head>
</head>
<body>
<input id="info" type="button" value="click me!" />
<script type="text/javascript">
//addeventlistener()和removeeventlistener()中handler函数必须相同，移除事件函数才有效。
function myhandler(){
console.log("i have been clicked!");
document.getElementById(‘info‘).removeEventListener(‘click‘,myhandler,false);
}
var target=document.getElementById(‘info‘);
target.addEventListener(‘click‘,myhandler,false);
</script>
</body>
</html>
原文：http://www.cnblogs.com/l742314100/p/5934090.html