Detailed explanation of how to use jQuery Validation PlugIn_jquery

1. Necessary before use
Official website: http://bassistance.de/jquery-plugins/jquery-plugin-validation/
API: http://jquery.bassistance.de/api-browser/plugins.html
Current version: 1.5.5
Requires JQuery version: 1.2.6+, compatible with 1.3.2


2. Default verification rules

• (1)required:true Required fields
• (2)remote:"check.php" Use the ajax method to call check.php to verify the input value
• (3)email:true You must enter an email in the correct format
• (4)url:true You must enter the URL in the correct format
• (5)date:true You must enter the date in the correct format
• (6)dateISO:true You must enter the date (ISO) in the correct format, for example: 2009-06-23, 1998/01/22 Only the format is verified, not the validity
• (7)number:true You must enter a legal number (negative number, decimal)
• (8)digits:true You must enter an integer
• (9)creditcard: You must enter a legal credit card number
• (10)equalTo:"#field" The input value must be the same as #field
• (11)accept: Enter a string with a legal suffix (the suffix of the uploaded file)
• (12)maxlength:5 Enter a string with a maximum length of 5 (Chinese characters count as one character)
• (13)minlength:10 Enter a string with a minimum length of 10 (Chinese characters count as one character)
• (14)rangelength:[5,10] The input length must be a string between 5 and 10") (Chinese characters count as one character)
• (15)range:[5,10] The input value must be between 5 and 10
• (16)max:5 The input value cannot be greater than 5
• (17)min:10 The input value cannot be less than 10
  

3. Default prompts

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}.") 
}, 

If you need to modify it, you can add it to the js code:

jQuery.extend(jQuery.validator.messages, { 
  required: "必选字段", 
remote: "请修正该字段", 
email: "请输入正确格式的电子邮件", 
url: "请输入合法的网址", 
date: "请输入合法的日期", 
dateISO: "请输入合法的日期 (ISO).", 
number: "请输入合法的数字", 
digits: "只能输入整数", 
creditcard: "请输入合法的信用卡号", 
equalTo: "请再次输入相同的值", 
accept: "请输入拥有合法后缀名的字符串", 
maxlength: jQuery.validator.format("请输入一个长度最多是 {0} 的字符串"), 
minlength: jQuery.validator.format("请输入一个长度最少是 {0} 的字符串"), 
rangelength: jQuery.validator.format("请输入一个长度介于 {0} 和 {1} 之间的字符串"), 
range: jQuery.validator.format("请输入一个介于 {0} 和 {1} 之间的值"), 
max: jQuery.validator.format("请输入一个最大为 {0} 的值"), 
min: jQuery.validator.format("请输入一个最小为 {0} 的值") 
}); 

Recommended practice, Put this file into messages_cn.js and introduce it into the page
[codept src="../js/messages_cn.js" type="text/javascript"> [/code
4. How to use
1. Write the verification rules into the control

<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">确认密码</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> 

To use class="{}", the package must be imported: jquery.metadata.js
You can use the following method to modify the prompt content:

Copy code The code is as follows:

class="{required:true,minlength:5,messages:{required:' Please enter the content'}}"

 
在使用equalTo关键字时，后面的内容必须加上引号，如下代码： 

复制代码 代码如下:

class="{required:true,minlength:5,equalTo:'#password'}"

 
另外一个方式，使用关键字：meta（为了元数据使用其他插件你要包装 你的验证规则 在他们自己的项目中可以用这个特殊的选项） 
再有一种方式： 

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

这样可以使用validate="{required:true}"的方式，或者class="required"，但class="{required:true,minlength:5}"将不起作用  
2.将校验规则写到代码中   

$().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: "请输入姓名", 
 email: { 
 required: "请输入Email地址", 
 email: "请输入正确的email地址" 
 }, 
 password: { 
 required: "请输入密码", 
 minlength: jQuery.format("密码不能小于{0}个字符") 
 }, 
 confirm_password: { 
 required: "请输入确认密码", 
 minlength: "确认密码不能小于5个字符", 
 equalTo: "两次输入密码不一致不一致" 
 } 
} 
 }); 
}); 
//messages处，如果某个控件没有message，将调用默认的信息 
 
<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">确认密码</label> 
<input id="confirm_password" name="confirm_password" type="password" /> 
</p> 
 <p> 
  <input class="submit" type="submit" value="Submit"/> 
 </p> 
</form> 

required:true 必须有值 
required:"#aa:checked"表达式的值为真，则需要验证 
required:function(){}返回为真，表时需要验证 
后边两种常用于，表单中需要同时填或不填的元素  

五、实例讲解

实例一：精简验证，通过表单对象调用validate()方法进行验证，验证规则通过html标签属性定义：以下为常用属性定义距离

class='required'　　//必须字段
class='mail'　　//邮箱验证
class='url'　　//URL网址验证
class='date'　　//正确的日期 格式满足 2012，0204，2012-02-04
class='number'　　//输入合法的数字
class='digits'　　//输入整数
minlength=''　　//最小输入长度
maxlength=''　　//最长输入长度(该值不会提示，当值达到一定字符数不可再增长)
max=''　　//输入的数值小于指定值
min=''　　//输入的数值大于指定值

<!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 - 表单验证插件实例 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>表单验证</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>

实例二：方法验证，通过自定义表单规则来验证表单

<!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 - 表单验证插件实例 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:"需要输入名称", minlength:"名称长度在3-40个字符之间", maxlength:"名称长度在3-40个字符之间",remote:"用户名已存在"},
    email: {required:"需要输入电子邮箱", email:"电子邮箱格式不正确"},
    url: {required:"需要输入URL地址", url:"URL地址格式不正确"},
    text:"需要输入文本内容"
   },
  });
 });
 </script>
</head>
<body>
 <form id="commentForm" method="get" action="" >
 <fieldset>
 <legend>表单验证</legend>
 <p><label class="title" >Name</label><input id="name" name="name"/>
  <em><label class="field_notice"></label><label id="checking" class="checking">检查中...</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>

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