<!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.childNodes.length;
for(var i = 0; i < x;i++ )
{
//document.write(x[i]+"<br>");
//var s = content.removeChild(x[i]);
var x = content.removeChild(content.childNodes[0]);
document.write("删除节点的内容："+x[i].innerHTML+"<br>");
s = null;
}
}
</script>
<button onclick="clearText()">清除节点内容</button>
</body>
</html>
var x = content.removeChild(content.childNodes[0]); x[i]是什么？x才是返回的节点
还有变量可以设那么多，为什么非要死磕一个x用了还要重新用呢
<script type="text/javascript">
function clearText() {
var content=document.getElementById("content");
// 在此完成该函数
var x = content.childNodes.length;
for(var i = 0; i < x;i++ )
{
var a = content.removeChild(content.childNodes[0]);
if(a.nodeType==3)
{document.write("删除了空节点"+"<br>")}
document.write("删除节点的内容："+a.innerHTML+"<br>");
s = null;
}
}
</script>