<!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");
// 在此完成该函数
var x=content.childNode;
for (var i=0;i<x.length;i++){
if (x[i].nodetype!=1){
content.removeChild(content.x[i].innerHTML);
}
}
}
</script>
<button onclick="clearText()">清除节点内容</button>
</body>
</html>
if (x[i].nodetype!=1){//nodeType,T大写
改为：
var x=content.childNodes;
for(var i=0;i<x.length;i++){
if (x[i].nodeType!=1){continue;}
else{
content.removeChild(x[i]);
}
}
}
var x=content.childNode;少写了s
改为：var x = content.childNodes;