为什么我的js部分显示不出来啊？我哪里写错了吗？详解必采纳
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<ul id="nodeList">
<li>nodeName</li>
<li>nodeValue</li>
<li>nodeType</li>
</ul>
<p></p>
<script>
var nodes=document.getElementById("nodeList");
var type1=nodes.firstChild.nodeType;
var type2=nodes.firstChild.firstChild.nodeType;
var name=nodes.firstChild.firstChild.nodeName;
var str=nodes.firstChild.firstChild.nodeValue;
var reason="type1:"+type1+"
type2:"+type2+"
name:"+name+"
str:"+str;
document.getElementById("nodeList").nextSibling.innerHTML=reason;
</script>
</body>
</html>
