<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>getElementById.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body>
<form name="form1" action="test.html" method="post" >
<input type="text" name="username" value="国庆六十周年_1" id="tid" onchange="" >
<input type="button" name="ok" value="保存1" />
</form>
</body>
<script type="text/javascript">
//输出<input type="text" name="username" value="国庆六十周年_1" id="tid">标签value属性的值
var inputElement=document.getElementById("tid");
alert(inputElement.value);
//输出<input type="text" name="username" value="国庆六十周年_1" id="tid">标签type属性的值
alert(inputElement.type);
</script>
</html>
</pre><pre name="code" class="html">
就是很简单的得到相应的标签！！！
大家随意看一看就可以了