messages: { 
 required: "This field is required.", 
 remote: "Please fix this field.", 
 email: "Please enter a valid email address.", 
 url: "Please enter a valid URL.", 
 date: "Please enter a valid date.", 
 dateISO: "Please enter a valid date (ISO).", 
 dateDE: "Bitte geben Sie ein g眉ltiges Datum ein.", 
 number: "Please enter a valid number.", 
 numberDE: "Bitte geben Sie eine Nummer ein.", 
 digits: "Please enter only digits", 
 creditcard: "Please enter a valid credit card number.", 
 equalTo: "Please enter the same value again.", 
 accept: "Please enter a value with a valid extension.", 
 maxlength: $.validator.format("Please enter no more than {0} characters."), 
 minlength: $.validator.format("Please enter at least {0} characters."), 
 rangelength: $.validator.format("Please enter a value between {0} and {1} characters long."), 
 range: $.validator.format("Please enter a value between {0} and {1}."), 
 max: $.validator.format("Please enter a value less than or equal to {0}."), 
 min: $.validator.format("Please enter a value greater than or equal to {0}.") 
}, 

jQuery.extend(jQuery.validator.messages, { 
  required: "必選字段", 
remote: "請(qǐng)修正該字段", 
email: "請(qǐng)輸入正確格式的電子郵件", 
url: "請(qǐng)輸入合法的網(wǎng)址", 
date: "請(qǐng)輸入合法的日期", 
dateISO: "請(qǐng)輸入合法的日期 (ISO).", 
number: "請(qǐng)輸入合法的數(shù)字", 
digits: "只能輸入整數(shù)", 
creditcard: "請(qǐng)輸入合法的信用卡號(hào)", 
equalTo: "請(qǐng)?jiān)俅屋斎胂嗤闹?quot;, 
accept: "請(qǐng)輸入擁有合法后綴名的字符串", 
maxlength: jQuery.validator.format("請(qǐng)輸入一個(gè)長(zhǎng)度最多是 {0} 的字符串"), 
minlength: jQuery.validator.format("請(qǐng)輸入一個(gè)長(zhǎng)度最少是 {0} 的字符串"), 
rangelength: jQuery.validator.format("請(qǐng)輸入一個(gè)長(zhǎng)度介于 {0} 和 {1} 之間的字符串"), 
range: jQuery.validator.format("請(qǐng)輸入一個(gè)介于 {0} 和 {1} 之間的值"), 
max: jQuery.validator.format("請(qǐng)輸入一個(gè)最大為 {0} 的值"), 
min: jQuery.validator.format("請(qǐng)輸入一個(gè)最小為 {0} 的值") 
}); 

<script src="../js/jquery.js" type="text/javascript"></script> 
<script src="../js/jquery.validate.js" type="text/javascript"></script> 
<script src="./js/jquery.metadata.js" type="text/javascript"></script> 
$().ready(function() { 
$("#signupForm").validate(); 
}); 
 
<form id="signupForm" method="get" action=""> 
 <p> 
  <label for="firstname">Firstname</label> 
  <input id="firstname" name="firstname" class="required" /> 
 </p> 
<p> 
<label for="email">E-Mail</label> 
<input id="email" name="email" class="required email" /> 
</p> 
<p> 
<label for="password">Password</label> 
<input id="password" name="password" type="password" class="{required:true,minlength:5}" /> 
</p> 
<p> 
<label for="confirm_password">確認(rèn)密碼</label> 
<input id="confirm_password" name="confirm_password" type="password" class="{required:true,minlength:5,equalTo:'#password'}" /> 
</p> 
 <p> 
  <input class="submit" type="submit" value="Submit"/> 
 </p> 
</form> 

$.metadata.setType("attr", "validate"); 

$().ready(function() { 
$("#signupForm").validate({ 
  rules: { 
 firstname: "required", 
 email: { 
 required: true, 
 email: true 
 }, 
 password: { 
 required: true, 
 minlength: 5 
 }, 
 confirm_password: { 
 required: true, 
 minlength: 5, 
 equalTo: "#password" 
 } 
}, 
  messages: { 
 firstname: "請(qǐng)輸入姓名", 
 email: { 
 required: "請(qǐng)輸入Email地址", 
 email: "請(qǐng)輸入正確的email地址" 
 }, 
 password: { 
 required: "請(qǐng)輸入密碼", 
 minlength: jQuery.format("密碼不能小于{0}個(gè)字符") 
 }, 
 confirm_password: { 
 required: "請(qǐng)輸入確認(rèn)密碼", 
 minlength: "確認(rèn)密碼不能小于5個(gè)字符", 
 equalTo: "兩次輸入密碼不一致不一致" 
 } 
} 
 }); 
}); 
//messages處，如果某個(gè)控件沒(méi)有message，將調(diào)用默認(rèn)的信息 
 
<form id="signupForm" method="get" action=""> 
 <p> 
  <label for="firstname">Firstname</label> 
  <input id="firstname" name="firstname" /> 
 </p> 
<p> 
<label for="email">E-Mail</label> 
<input id="email" name="email" /> 
</p> 
<p> 
<label for="password">Password</label> 
<input id="password" name="password" type="password" /> 
</p> 
<p> 
<label for="confirm_password">確認(rèn)密碼</label> 
<input id="confirm_password" name="confirm_password" type="password" /> 
</p> 
 <p> 
  <input class="submit" type="submit" value="Submit"/> 
 </p> 
</form> 

<!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>
 <title>jQuery PlugIn - 表單驗(yàn)證插件實(shí)例 Validate </title>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <script type="text/javascript" src="jquery.js"></script>
 <script type="text/javascript" src="jquery.validate.min.js"></script>
 <script type="text/javascript" src="messages_cn.js"></script>
 <style type="text/css">
 * { font-family: Verdana; font-size:13px; }
 input[type='text']{width:200px;}
 textarea{width:155px;}
 label { width: 10em; float: left; }
 label.error { float: none; color: red; padding-left: .5em; vertical-align: top; }
 </style>
 <script>
 $(document).ready(function(){
  $("#commentForm").validate();
 });
 </script>
</head>
<body>
 <form id="commentForm" method="get" action="" >
 <fieldset>
 <legend>表單驗(yàn)證</legend>
 <p><label>Name</label><input name="name" class="required" maxlength="4" minlength="2" /></p>
 <p><label >E-Mail</label><input name="email" class="required email" /></p>
 <p><label >URL</label><input name="url" class="url"/></p>
 <p><label>text</label><textarea name="text" cols="22" class="required"></textarea></p>
 <p><input class="submit" type="submit" value="提交"/></p>
 </fieldset>
 </form>
</body>
</html>

<!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>
 <title>jQuery PlugIn - 表單驗(yàn)證插件實(shí)例 Validate </title>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <script type="text/javascript" src="jquery.js"></script>
 <script type="text/javascript" src="jquery.validate.min.js"></script>
 <script type="text/javascript" src="messages_cn.js"></script>
 <style type="text/css">
 * { font-family: Verdana; font-size:13px; }
 input[type='text']{width:200px;}
 textarea{width:155px;}
 .title{float:left;width:10em}
 em.error { float: none; color: red; padding-left: .5em; vertical-align: top; }
 .field_notice{display:none;}
 .checking{display:none;}
 </style>
 <script>
 $(document).ready(function(){
  $("#commentForm").validate({
   errorPlacement: function(error, element){
    var error_td = element.next('em');
    error_td.find('.field_notice').hide();
    error_td.append(error);
   },
   success: function(label){
    label.addClass('validate_right').text('OK!');
   },
   onkeyup: false,
   rules: {
    name: {
     required:true,
     minlength:3,
     maxlength:40,
     remote:{
      url :'index.php&#63;ajax=1',
      type:'get',
      data:{
       name : function(){
        return $('#name').val();
       }
      },
      beforeSend:function(){
       var _checking = $('#checking');
       _checking.prev('.field_notice').hide();
       _checking.next('label').hide();
       $(_checking).show();
      },
      complete :function(){
       $('#checking').hide();
      }
     }
    },
    email: {required: true, email: true },
    url:{required:true,url:true},
    text:"required"
   },
   messages: {
    name: {required:"需要輸入名稱", minlength:"名稱長(zhǎng)度在3-40個(gè)字符之間", maxlength:"名稱長(zhǎng)度在3-40個(gè)字符之間",remote:"用戶名已存在"},
    email: {required:"需要輸入電子郵箱", email:"電子郵箱格式不正確"},
    url: {required:"需要輸入U(xiǎn)RL地址", url:"URL地址格式不正確"},
    text:"需要輸入文本內(nèi)容"
   },
  });
 });
 </script>
</head>
<body>
 <form id="commentForm" method="get" action="" >
 <fieldset>
 <legend>表單驗(yàn)證</legend>
 <p><label class="title" >Name</label><input id="name" name="name"/>
  <em><label class="field_notice"></label><label id="checking" class="checking">檢查中...</label></em>
 </p>
 <p><label class="title" >E-Mail</label><input name="email"/>
  <em><label class="field_notice"></label></em>
 </p>
 <p><label class="title" >URL</label><input name="url"/>
  <em><label class="field_notice"></label></em>
 </p>
 <p><label class="title" >text</label><textarea name="text" cols="22"></textarea>
  <em><label class="field_notice"></label></em>
 </p>
 <p><input class="submit" type="submit" value="提交"/></p>
 </fieldset>
 </form>
</body>
</html>