document获取节点ByName和ByTagName

//ByName获取
var names = document.getElementsByName("name");
		alert(names[0].value);

//byTagName也是一样的,返回数组和长度

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>document</title>
<script type="text/javascript">
function fun(){
	var nodes = document.getElementsByTagName("a");
	alert(nodes.length);
	nodes[0].target = "http://www.csdn.net/";
	alert(nodes[0].innerHTML);
}

</script>
</head>

<body>
	<input type="button" value="演示DOM" onclick="fun()">
	<a href="http://www.baidu.com">寻他千百度</a>
</body>
</html>


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