代码编辑器：
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<meta charset="utf-8">3
<link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/>4
<script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script> 5
<script>6
$(document).ready(function(){7
$("td:parent").css("background-color","yellow");8
});9
</script>10
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<h1>欢迎来到我的主页</h1>12
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<table border="1">14
<tr>15
<th>序号</th>16
<th>站点名</th>17
<th>网址</th>18
</tr>