<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script type="text/javascript" src="js/jquery-3.1.1.min.js" ></script>
<title></title>
<script>
var num = 0 ;
$(function(){
$(but1).on("click",function(){
alert(num++) ;
}) ;
$(but2).on("click",function(){
$(but1).unbind("click") ;
}) ;
}) ;
</script>
</head>
<body>
<input type="button" value="按钮" id="but1"><br>
<input type="button" value="按钮" id="but2"><br>
</body>
</html>
解除事件绑定
$(but1).unbind("click") ;
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