javascript复习第二天删除元素节点

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head>    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">    <title>Document</title><script>function delList(){    var list = document.getElementsByClassName('list');    var lastlist = list[list.length-1];    lastlist.parentNode.removeChild(lastlist);}</script></head><body>    <input type="button" value="删除最后一个元素" onclick = "delList();" />    <ul>        <li class = "list">1</li>        <li class = "list">2</li>        <li class = "list">3</li>        <li class = "list">4</li>    </ul></body></html>
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