<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>无标题文档</title></head><body><div id="content"> <h1>html</h1> <h1>php</h1> <h1>javascript</h1> <h1>jquery</h1> <h1>java</h1></div><script type="text/javascript">function clearText() { var content=document.getElementById("content"); for(i=0;i<content.childNodes.length;i++) { var x=content.removeChild(content.childNodes[i]); }}</script><button onclick="clearText()">清除节点内容</button>
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