jQuery Validate表单校验

jQuery plugin: Validation 使用说明

学习链接及下载地址：http://www.runoob.com/jquery/jquery-plugin-validate.html

一导入js库
<script src="../js/jquery.js" type="text/javascript"></script>
<script src="../js/jquery.validate.js" type="text/javascript"></script>

默认提示

 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 ).",
     number: "Please enter a valid number.",
     digits: "Please enter only digits.",
     creditcard: "Please enter a valid credit card number.",
     equalTo: "Please enter the same value again.",
     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}." )
 }

DEMO

 $().ready(function() {
 // 在键盘按下并释放及提交后验证提交表单
   $("#signupForm").validate({
     rules: {
       firstname: "required",
       lastname: "required",
       username: {
         required: true,
         minlength: 2
       },
       password: {
         required: true,
         minlength: 5
       },
       confirm_password: {
         required: true,
         minlength: 5,
         equalTo: "#password"
       },
       email: {
         required: true,
         email: true
       },
       topic: {
         required: "#newsletter:checked",
         minlength: 2
       },
       agree: "required"
     },
     messages: {
       firstname: "请输入您的名字",
       lastname: "请输入您的姓氏",
       username: {
         required: "请输入用户名",
         minlength: "用户名必需由两个字母组成"
       },
       password: {
         required: "请输入密码",
         minlength: "密码长度不能小于 5 个字母"
       },
       confirm_password: {
         required: "请输入密码",
         minlength: "密码长度不能小于 5 个字母",
         equalTo: "两次密码输入不一致"
       },
       email: "请输入一个正确的邮箱",
       agree: "请接受我们的声明",
       topic: "请选择两个主题"
      }
     })
 });

messages 处，如果某个控件没有 message，将调用默认的信息

 <form class="cmxform" id="signupForm" method="get" action="">
   <fieldset>
     <legend>验证完整的表单</legend>
     <p>
       <label for="firstname">名字</label>
       <input id="firstname" name="firstname" type="text">
     </p>
     <p>
       <label for="lastname">姓氏</label>
       <input id="lastname" name="lastname" type="text">
     </p>
     <p>
       <label for="username">用户名</label>
       <input id="username" name="username" type="text">
     </p>
     <p>
       <label for="password">密码</label>
       <input id="password" name="password" type="password">
     </p>
     <p>
       <label for="confirm_password">验证密码</label>
       <input id="confirm_password" name="confirm_password" type="password">
     </p>
     <p>
       <label for="email">Email</label>
       <input id="email" name="email" type="email">
     </p>
     <p>
       <label for="agree">请同意我们的声明</label>
       <input type="checkbox" class="checkbox" id="agree" name="agree">
     </p>
     <p>
       <label for="newsletter">我乐意接收新信息</label>
       <input type="checkbox" class="checkbox" id="newsletter" name="newsletter">
     </p>
     <fieldset id="newsletter_topics">
       <legend>主题 (至少选择两个) - 注意：如果没有勾选“我乐意接收新信息”以下选项会隐藏，但我们这里作为演示让它可见</legend>
       <label for="topic_marketflash">
         <input type="checkbox" id="topic_marketflash" value="marketflash" name="topic">Marketflash
       </label>
       <label for="topic_fuzz">
         <input type="checkbox" id="topic_fuzz" value="fuzz" name="topic">Latest fuzz
       </label>
       <label for="topic_digester">
         <input type="checkbox" id="topic_digester" value="digester" name="topic">Mailing list digester
       </label>
       <label for="topic" class="error">Please select at least two topics you'd like to receive.</label>
     </fieldset>
     <p>
       <input class="submit" type="submit" value="提交">
     </p>
   </fieldset>
 </form>

required: true 值是必须的。
required: "#aa:checked" 表达式的值为真，则需要验证。
required: function(){} 返回为真，表示需要验证。

后边两种常用于，表单中需要同时填或不填的元素。