可以这样有选择的清除节点内容吗？求大神帮我看看怎么改这代码
<!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 node = document.getElementById("ct").innerHTML;
for(var i=0;i<content.childNode.length;i++){
if(content.childNodes[i].nodeType!=1){
continue;
}else if(node==content.childNode[i].innerHTML){
var x = content.removeChild(content.childNode[i]);
x = null;
}
}
}
</script>
<input type="text" id="ct" value=" ">
<button onclick="clearText()">清除节点内容</button>
</body>
</html>
