<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="lib/jquery/jquery-1.3.2.js">
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquery2.1</title>
<script>
function showjQueryObjectMethod(){
alert("标签的数量为：" + $('#form1 *').length + " \r\n\r\n标签的内容为：" + $('#form1 *').html());
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<p>
username:<input type="text" name="username" id="username" />
<br/>
password:<input type="password" name="password" id="password" />
<br/>
<input type="button" name="button" id="button" value="显示" onclick="showjQueryObjectMethod()"/>
</p>
</form>
</body>
</html>
alert()中没有P啊，，，我晕了，
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="lib/jquery/jquery-1.3.2.js">
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquery2.1</title>
<script>
function showjQueryObjectMethod(){
alert("标签的数量为：" + $('#form1 *').length + " \r\n\r\n标签的内容为：" + $('#form1 *').html());
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<p>
username:<input type="text" name="username" id="username" />
<br/>
password:<input type="password" name="password" id="password" />
<br/>
<input type="button" name="button" id="button" value="显示" onclick="showjQueryObjectMethod()"/>
</p>
</form>
</body>
</html>
alert()中没有P啊，，，我晕了，
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="lib/jquery/jquery-1.3.2.js">
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquery2.1 </title>
<script>
function showjQueryObjectMethod(){
alert("标签的数量为：" + $('#form1').length + " \r\n\r\n标签的内容为：" + $('#form1 *').html());
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<p>
username: <input type="text" name="username" id="username" />
<br/>
password: <input type="password" name="password" id="password" />
<br/>
<input type="button" name="button" id="button" value="显示" onclick="showjQueryObjectMethod()"/>
</p>
</form>
</body>
</html>
加*了就是拿P里的对象了.
#form1 *取的是#form1下的所有元素，html()取得第一个匹配元素的html内容，也就是到p中的HTML