<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="jquery-1.7.2.js" ></script>
<title>遍历所有的radio</title>
</head>
<body>
<p>
<input type="button" name="button" id="button1" value="获取第二个radio" onclick="getn2()"/>
<input type="button" name="button" id="button1" value="获取radio数量" onclick="getcount()"/>
<input type="radio" name="radio" id="rad1" value="rad1" checked="checked" />
<label for="rad1">单选1</label>
<input type="radio" name="radio" id="rad2" value="rad2" />
<label for="rad2">单选2</label>
</p>
<script>
//alert( $(":radio").length );
//alert( $("input:radio").length );
//alert( $("input[type='radio']").length );
function getn2()
{
//获取第二个radio
alert( $("input[type='radio']").eq(1).attr('checked'));
}
function getcount()
{
//获取radio数量
alert( $("input[type='radio']").length );
}
</script>
</body>
</html>