怎么把错误信息返回至页面中呢，这个好像没讲清楚啊
这个代码哪里错了？？？
<!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=gb2312" />
<title>无标题文档</title>
<link href="type.css" rel="stylesheet" type="text/css">
<script src="vendor/jquery.validate-1.13.1.js" type="text/javascript"></script>
<script src="vendor/jquery-1.10.0.js" type="text/javascript"></script>
</head>
<body>
<form id="demoForm" method='post'>
<fieldset>
<legend>用户登录</legend>
<p>
<label for="username">用户名</label>
<input type="text" id="username" name="username">
</p>
<p>
<label for="password">密码</label>
<input type="password" id="password" name="password">
</p>
<p>
<input type="submit" value="登录">
</p>
</fieldset>
</form>
<script type="text/javascript">
$(document).ready(function(){
$("#demoForm").validate({
rules: {
username:{
required:true,
minlength:2,
maxlength:10
},
password:{
required:true,
minlength:2,
maxlength:16
}
}
messages: {
username:{
required:"用户名必须填写",
minlength:"用户名最少为2字符",
maxlength:"用户名最大为10字符"
},
password:{
required:"密码必须填写",
minlength:"密码最少为2字符",
maxlength:"密码最大为16字符"
}
}
});
});
</script>
</body>
</html>
css样式
body {
font-size: 36px;
line-height: 1.6;
}
p {
margin: 10px 0;
}
label {
display: inline-block;
min-width: 140px;
}
label.error {
margin-left: 10px;
color: red;
}
input, button {
font-size: 36px;
line-height: 35px;
border: 1px solid #999;
min-width: 180px;
}
input.error {
border: 1px solid red;
}
input[type=submit], button {
margin-top: 20px;
font-size: 36px;
padding: 10px 0;
}
/* CSS Document */