<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>document节点</title>
<script>
function fun(){
//获取节点
var node = document.getElementById("divId");
alert(node.nodeName+":"+node.nodeType+":"+node.nodeValue);
//获取文本
var text = node.innerHTML;
alert(text);
//此方法还能改变文本内容；
//node.innerHTML="要改的内容"";
}
</script>
</head>
<body>
<input type="button" value="演示DOM" οnclick="fun()">
<div id="divId">区域</div>
</body>
</html>
