你应该了解的jquery 验证框架

Jquery validate 验证具体查看附件中demo

主要是几种使用形式：

1、写在js中：

$("#signupForm").validate({rules: {firstname: "required",lastname: "required",},messages: {firstname: "Please enter your firstname",lastname: "Please enter your lastname",}});

2、写在标签中： 有两种形式

① 如下： （label 标签显示错误信息） 简单应用

<label for="cname">Name (required, at least 2 characters)</label><input id="cname" name="name" class="required" minlength="2" />

②需要 引用jquery.metadata.js 自定义

<input name="user" title="Please enter your username (at least 3 characters)" class="{required:true,minlength:3}" />

另外

$("#commentForm").validate({meta: "validate"});

<input id="cemail" name="email" class="{validate:{required:true, email:true, messages:{required:'Please enter your email address', email:'Please enter a valid email address'}}}"/>

jQuery校验一导入js库<script src="../js/jquery.js" type="text/javascript"></script><script src="../js/jquery.validate.js" type="text/Javascript"></script>二、默认校验规则(1)required:true 必输字段(2)remote:"check.php" 使用Ajax方法调用check.php验证输入值(3)email:true 必须输入正确格式的电子邮件(4)url:true 必须输入正确格式的网址(5)date:true 必须输入正确格式的日期 日期校验ie6出错，慎用(6)dateISO:true 必须输入正确格式的日期(ISO)，例如：2009-06-23，1998/01/22 只验证格式，不验证有效性(7)number:true 必须输入合法的数字(负数，小数)(8)digits:true 必须输入整数(9)creditcard: 必须输入合法的信用卡号(10)equalTo:"#field" 输入值必须和#field相同(11)accept: 输入拥有合法后缀名的字符串（上传文件的后缀）(12)maxlength:5 输入长度最多是5的字符串(汉字算一个字符)(13)minlength:10 输入长度最小是10的字符串(汉字算一个字符)(14)rangelength:[5,10] 输入长度必须介于 5 和 10 之间的字符串")(汉字算一个字符)(15)range:[5,10] 输入值必须介于 5 和 10 之间(16)max:5 输入值不能大于5(17)min:10 输入值不能小于10三、默认的提示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).", 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: $.validator.format("Please enter a value greater than or equal to {0}.")},如需要修改，可在js代码中加入：jQuery.extend(jQuery.validator.messages, { required: "必选字段", remote: "请修正该字段", email: "请输入正确格式的电子邮件", url: "请输入合法的网址", date: "请输入合法的日期", dateISO: "请输入合法的日期 (ISO).", number: "请输入合法的数字", digits: "只能输入整数", creditcard: "请输入合法的信用卡号", equalTo: "请再次输入相同的值", accept: "请输入拥有合法后缀名的字符串", maxlength: jQuery.validator.format("请输入一个 长度最多是 {0} 的字符串"), minlength: jQuery.validator.format("请输入一个 长度最少是 {0} 的字符串"), rangelength: jQuery.validator.format("请输入 一个长度介于 {0} 和 {1} 之间的字符串"), range: jQuery.validator.format("请输入一个介于 {0} 和 {1} 之间的值"), max: jQuery.validator.format("请输入一个最大为{0} 的值"), min: jQuery.validator.format("请输入一个最小为{0} 的值")});推荐做法，将此文件放入messages_cn.js中，在页面中引入<script src="../js/messages_cn.js" type="text/javascript"></script>四、使用方式1.将校验规则写到控件中<script src="../js/jquery.js" type="text/javascript"></script><script src="../js/jquery.validate.js" type="text/javascript"></script><script src="./js/jquery.metadata.js" type="text/javascript"></script>$().ready(function() {$("#signupForm").validate();});<form id="signupForm" method="get" action=""> <p> <label for="firstname">Firstname</label> <input id="firstname" name="firstname" class="required" /> </p><p> <label for="email">E-Mail</label> <input id="email" name="email" class="required email" /></p><p> <label for="passWord">Password</label> <input id="password" name="password" type="password" class="{required:true,minlength:5}" /></p><p> <label for="confirm_password">确认密码</label> <input id="confirm_password" name="confirm_password" type="password" class="{required:true,minlength:5,equalTo:'#password'}" /></p> <p> <input class="submit" type="submit" value="Submit"/> </p></form>使用class="{}"的方式，必须引入包：jquery.metadata.js可以使用如下的方法，修改提示内容：class="{required:true,minlength:5,messages:{required:'请输入内容'}}"在使用equalTo关键字时，后面的内容必须加上引号，如下代码：class="{required:true,minlength:5,equalTo:'#password'}"2.将校验规则写到js代码中$().ready(function() {$("#signupForm").validate({ rules: { firstname: "required", email: { required: true, email: true }, password: { required: true, minlength: 5 }, confirm_password: { required: true, minlength: 5, equalTo: "#password" } }, messages: { firstname: "请输入姓名", email: { required: "请输入Email地址", email: "请输入正确的email地址" }, password: { required: "请输入密码", minlength: jQuery.format("密码不能小于{0}个字 符") }, confirm_password: { required: "请输入确认密码", minlength: "确认密码不能小于5个字符", equalTo: "两次输入密码不一致不一致" } } });});//messages处，如果某个控件没有message，将调用默认的信息<form id="signupForm" method="get" action=""> <p> <label for="firstname">Firstname</label> <input id="firstname" name="firstname" /> </p><p> <label for="email">E-Mail</label> <input id="email" name="email" /></p><p> <label for="password">Password</label> <input id="password" name="password" type="password" /></p><p> <label for="confirm_password">确认密码</label> <input id="confirm_password" name="confirm_password" type="password" /></p> <p> <input class="submit" type="submit" value="Submit"/> </p></form>required:true 必须有值required:"#aa:checked"表达式的值为真，则需要验证required:function(){}返回为真，表时需要验证后边两种常用于，表单中需要同时填或不填的元素五、常用方法及注意问题1.用其他方式替代默认的SUBMIT$().ready(function() {$("#signupForm").validate({ submitHandler:function(form){ alert("submitted"); form.submit(); } });});可以设置validate的默认值，写法如下：$.validator.setDefaults({submitHandler: function(form) { alert("submitted!");form.submit(); }});如果想提交表单, 需要使用form.submit()而不要使用$(form).submit()2.debug，只验证不提交表单如果这个参数为true，那么表单不会提交，只进行检查，调试时十分方便$().ready(function() {$("#signupForm").validate({ debug:true });});如果一个页面中有多个表单都想设置成为debug，用$.validator.setDefaults({ debug: true})3.ignore：忽略某些元素不验证ignore: ".ignore"4.更改错误信息显示的位置errorPlacement：CallbackDefault: 把错误信息放在验证的元素后面指明错误放置的位置，默认情况是：error.appendTo(element.parent());即把错误信息放在验证的元素后面errorPlacement: function(error, element) { error.appendTo(element.parent());}//示例：<tr> <td class="label"><label id="lfirstname" for="firstname">First Name</label></td> <td class="field"><input id="firstname" name="firstname" type="text" value="" maxlength="100" /></td> <td class="status"></td></tr><tr> <td style="padding-right: 5px;"> <input id="dateformat_eu" name="dateformat" type="radio" value="0" /> <label id="ldateformat_eu" for="dateformat_eu">14/02/07</label> </td> <td style="padding-left: 5px;"> <input id="dateformat_am" name="dateformat" type="radio" value="1" /> <label id="ldateformat_am" for="dateformat_am">02/14/07</label> </td> <td></td></tr><tr> <td class="label">&nbsp;</td> <td class="field" colspan="2"> <div id="termswrap"> <input id="terms" type="checkbox" name="terms" /> <label id="lterms" for="terms">I have read and accept the Terms of Use.</label> </div> </td></tr>errorPlacement: function(error, element) { if ( element.is(":radio") ) error.appendTo( element.parent().next().next() ); else if ( element.is(