节点类的问题
<body>
<div id="con">
<p>javascript</p>
<div>jQuery</div>
<h5>PHP</h5>
</div>
<script type="text/javascript">
var x=document.getElementById("con");
document.write(x.firstChild.nodeName+" "+x.firstChild.nodeValue+" "+x.firstChild.nodeType+"<br/>");
document.write(x.lastChild.nodeName+" "+x.firstChild.nodeValue+" "+x.firstChild.nodeType);
<div id="con">
<p>javascript</p>
<div>jQuery</div>
<h5>PHP</h5>
</div>
<script type="text/javascript">
var x=document.getElementById("con");
document.write(x.firstChild.nodeName+" "+x.firstChild.nodeValue+" "+x.firstChild.nodeType+"<br/>");
document.write(x.lastChild.nodeName+" "+x.firstChild.nodeValue+" "+x.firstChild.nodeType);
</script>
这里的显示出来的节点名称，还有节点值，还有节点类型是空白文本吧。。。。。。。
