如何把删除的子节点依次显示出来？为何我的这个代码每点击两次按钮依次删除一个子节点
<!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 conCN = content.childNodes;
while ( (conCN.length > 0) && (conCN[0].nodeType != 1) )
{
content.removeChild(conCN[0]);
}
//回显已删除
var newDiv = document.createElement("div");
if (conCN.length >0)
{
var rmNode = content.removeChild(conCN[0]);
}
else
{
newDiv.innerHTML = "there is no node!"
}
content.parentNode.appendChild(newDiv);
}
</script>
<button onclick="clearText()">清除节点内容</button>
</body>
</html>