jQuery Validate【强大的表单验证】

<script src="jquery.validate.js"></script>

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}." )
}

(function( factory ) {
	if ( typeof define === "function" && define.amd ) {
		define( ["jquery", "../jquery.validate"], factory );
	} else {
		factory( jQuery );
	}
}(function( $ ) {

/*
 * Translated default messages for the jQuery validation plugin.
 * Locale: ZH (Chinese, 中文 (Zhōngwén), 汉语, 漢語)
 */
$.extend($.validator.messages, {
	required: "这是必填字段",
	remote: "请修正此字段",
	email: "请输入有效的电子邮件地址",
	url: "请输入有效的网址",
	date: "请输入有效的日期",
	dateISO: "请输入有效的日期 (YYYY-MM-DD)",
	number: "请输入有效的数字",
	digits: "只能输入数字",
	creditcard: "请输入有效的信用卡号码",
	equalTo: "你的输入不相同",
	extension: "请输入有效的后缀",
	maxlength: $.validator.format("最多可以输入 {0} 个字符"),
	minlength: $.validator.format("最少要输入 {0} 个字符"),
	rangelength: $.validator.format("请输入长度在 {0} 到 {1} 之间的字符串"),
	range: $.validator.format("请输入范围在 {0} 到 {1} 之间的数值"),
	max: $.validator.format("请输入不大于 {0} 的数值"),
	min: $.validator.format("请输入不小于 {0} 的数值")
});

}));

<script src="http://static.runoob.com/assets/jquery-validation-1.14.0/dist/localization/messages_zh.js"></script>

<script src="http://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="http://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script src="http://static.runoob.com/assets/jquery-validation-1.14.0/dist/localization/messages_zh.js"></script>
<script>
$.validator.setDefaults({
    submitHandler: function() {
      alert("提交事件!");
    }
});
$().ready(function() {
    $("#commentForm").validate();
});
</script>

<form class="cmxform" >
  <fieldset>
    <legend>输入您的名字，邮箱，URL，备注。</legend>
    <p>
      <label for="cname">Name (必需, 最小两个字母)</label>
      <input  required>
    </p>
    <p>
      <label for="cemail">E-Mail (必需)</label>
      <input  required>
    </p>
    <p>
      <label for="curl">URL (可选)</label>
      <input >
    </p>
    <p>
      <label for="ccomment">备注 (必需)</label>
      <textarea  required></textarea>
    </p>
    <p>
      <input class="submit" type="submit" value="Submit">
    </p>
  </fieldset>
</form>

$().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"
    }
});

<form class="cmxform" >
  <fieldset>
    <legend>验证完整的表单</legend>
    <p>
      <label for="firstname">名字</label>
      <input >
    </p>
    <p>
      <label for="lastname">姓氏</label>
      <input >
    </p>
    <p>
      <label for="username">用户名</label>
      <input >
    </p>
    <p>
      <label for="password">密码</label>
      <input >
    </p>
    <p>
      <label for="confirm_password">验证密码</label>
      <input >
    </p>
    <p>
      <label for="email">Email</label>
      <input >
    </p>
    <p>
      <label for="agree">请同意我们的声明</label>
      <input type="checkbox" class="checkbox" >
    </p>
    <p>
      <label for="newsletter">我乐意接收新信息</label>
      <input type="checkbox" class="checkbox" >
    </p>
    <fieldset >
      <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" >Marketflash
      </label>
      <label for="topic_fuzz">
        <input type="checkbox" >Latest fuzz
      </label>
      <label for="topic_digester">
        <input type="checkbox" >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>