<!DOCTYPE html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="../dist/output.css" rel="stylesheet">
<link src="UserLoginJQuery.js" type="text/javascript">
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$(this).hide();
});
});
</script>
</head>
<body background="./UserLogin-background-init.jpg" class="bg-cover" id="UserLoginBody">
<button type="button">click me</button>
</body>
运行后，点击Click me按钮，没有反应，是什么原因呢？
