html
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script language="javascript" src="bind.js"></script>
<script language="javascript" src="../jquery-2.1.3.min.js"></script>
</head>
<body>
<input type="button" id="btn" value="点击我" onclick="del();" >
</body>
</html>
js
function del(){
alert("aaa");
$("#btn").attr("onclick","");
$("#btn").bind("click",function(){
bbb();
})
}
function bbb(){
alert("123456")
$("#btn").unbind("click");
$("#btn").bind("click",function(){
$("#btn").attr("click",function(){
ccc()
});
})
}
function ccc(){
alert("8888")
}
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