jQuery Validate表單校驗

jQuery plugin: Validation 使用說明  

學習鏈接及下載地址：http://www.runoob.com/jquery/jquery-plugin-validate.html

一導入js庫
<script src="../js/jquery.js" type="text/javascript"></script>
<script src="../js/jquery.validate.js" type="text/javascript"></script>

默認提示

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() {
// 在鍵盤按下並釋放及提交后驗證提交表單
  $("#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: "請輸入您的名字",
      lastname: "請輸入您的姓氏",
      username: {
        required: "請輸入用戶名",
        minlength: "用戶名必需由兩個字母組成"
      },
      password: {
        required: "請輸入密碼",
        minlength: "密碼長度不能小於 5 個字母"
      },
      confirm_password: {
        required: "請輸入密碼",
        minlength: "密碼長度不能小於 5 個字母",
        equalTo: "兩次密碼輸入不一致"
      },
      email: "請輸入一個正確的郵箱",
      agree: "請接受我們的聲明",
      topic: "請選擇兩個主題"
     }
    })
});

 messages 處，如果某個控件沒有 message，將調用默認的信息

<form class="cmxform" id="signupForm" method="get" action="">
  <fieldset>
    <legend>驗證完整的表單</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">用戶名</label>
      <input id="username" name="username" type="text">
    </p>
    <p>
      <label for="password">密碼</label>
      <input id="password" name="password" type="password">
    </p>
    <p>
      <label for="confirm_password">驗證密碼</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">請同意我們的聲明</label>
      <input type="checkbox" class="checkbox" id="agree" name="agree">
    </p>
    <p>
      <label for="newsletter">我樂意接收新信息</label>
      <input type="checkbox" class="checkbox" id="newsletter" name="newsletter">
    </p>
    <fieldset id="newsletter_topics">
      <legend>主題 (至少選擇兩個) - 注意：如果沒有勾選“我樂意接收新信息”以下選項會隱藏，但我們這里作為演示讓它可見</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 值是必須的。
required: "#aa:checked" 表達式的值為真，則需要驗證。
required: function(){} 返回為真，表示需要驗證。

后邊兩種常用於，表單中需要同時填或不填的元素。