JQuery笔记(表单验证)

1、JQuery笔记（表单验证）jquery.validate.js 是 jquery 旗下的一个验证插件，借助 jquery 的优势，我们可以迅速验证一些常见的输入 , 并且可以自己扩充自己的验证方法。 举个例子，有这么一个表单： view plaincopy to clipboardprint?<form id="signupForm" method="get" action=""> <fieldset> <legend>Validating a complete form</legend&g

2、t; <p> <label for="firstname">Firstname</label> <input id="firstname" name="firstname" class="required"/> </p> <p> <label for="lastname">Lastname</label> <input id="lastname" name="las

3、tname" /> </p> <p> <label for="username">Username</label> <input id="username" name="username" /> </p> <p> <label for="password">Password</label> <input id="password" name="passwor

4、d" type="password" /> </p> <p> <label for="confirm_password">Confirm password</label> <input id="confirm_password" name="confirm_password" type="password" /> </p> <p> <label for="email"&g

5、t;Email</label> <input id="email" name="email" /> </p> <p> <input class="submit" type="submit" value="Submit"/> </p> </fieldset> </form> <form id="signupForm" method="get" action=

6、""><fieldset><legend>Validating a complete form</legend><p><label for="firstname">Firstname</label><input id="firstname" name="firstname" class="required"/></p><p><label for="lastname&q

7、uot;>Lastname</label><input id="lastname" name="lastname" /></p><p><label for="username">Username</label><input id="username" name="username" /></p><p><label for="password">Pass

8、word</label><input id="password" name="password" type="password" /></p><p><label for="confirm_password">Confirm password</label><input id="confirm_password" name="confirm_password" type="password&

9、quot; /></p><p><label for="email">Email</label><input id="email" name="email" /></p><p><input class="submit" type="submit" value="Submit"/></p></fieldset></form>在这个表单中，有名、

10、姓、用户名、密码、确认密码和 email 。他们都为非空，并且电子邮件需要是格式正确的地址、确认密码和密码一致。使用 jQuery 验证最简单的方式是引入 jquery.js 和 jquery validation.js 两个 js 文件。然后分别在 input 中加入 class 即： view plaincopy to clipboardprint?<input id="firstname" name="firstname" class="required"/> <input id="lastname&

11、quot; name="lastname" class="required"/> <input id="username" name="username" class="required"/> <input id="password" name="password" type="password" class="required"/> <input id="confirm

12、_password" name="confirm_password" type="password" class="required" equalTo="#password"/> <input id="email" name="email" class="required email"/> <input id="firstname" name="firstname" class=&q

13、uot;required"/><input id="lastname" name="lastname" class="required"/><input id="username" name="username" class="required"/><input id="password" name="password" type="password" class=&qu

14、ot;required"/><input id="confirm_password" name="confirm_password" type="password" class="required" equalTo="#password"/><input id="email" name="email" class="required email"/>以下列出 validate 自带的默认验证 re

15、quired: " 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:

16、" 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.format(" 请输入一个长度最多是 0 的字符串 "), minlength: jQuery.format(" 请输入一个长度最少是 0 的字符串 "), rangelength: jQuery.format(" 请输入一个长度介于 0 和 1 之间的字符串 "), range: jQuery.format(" 请输入一个介于 0 和 1 之间的值 "

17、), max: jQuery.format(" 请输入一个最大为 0 的值 "), min: jQuery.format(" 请输入一个最小为 0 的值 ") 然后，在 document 的 read 事件中，加入如下方法： <script> $(document).ready(function() $("#signupForm").validate(); </script> 这样，当 form 被提交的时候，就会根据 input 指定的 class 来进行验证了。如果失败， form 的提交就会被阻止。并且，

18、将提示信息显示在 input 的后面。 不过，这样感觉不好，因为验证规则侵入了我们的 html 代码。还有一个方式，便是使用“ rules” 。我们将 input 的那些验证用 class 删除掉。然后修改 document 的 ready 事件响应代码： $(document).ready(function() $("#signupForm").validate( rules: firstname:"required", lastname:"required", username:"required", pass

19、word:"required", confirm_password: required:true, equalTo:"#password" , email: required:true, email:true ); ) 这样以来，也能达到相同的效果。 那么，接下的问题，就是显示的错误提示是默认的。我们需要使用自定义的提示： $(document).ready(function() $("#signupForm").validate( rules: firstname:"required", lastname:&qu

20、ot;required", username:"required", password:"required", confirm_password: required:true, equalTo:"#password" , email: required:true, email:true , messages: firstname:" 必填项", lastname:" 必填项", username:" 必填项", password:" 必填项",

21、confirm_password: required:" 必填项", equalTo:" 密码不一致" , email: required:" 必填项", email:" 格式有误" ); ) 如果你还想在错误信息上显示特别的样式 ( 比如字体为红色 ) 即可通过添加： <style type="text/css"> #signupForm label.error padding-left: 16px; margin-left: 2px; color:red; background:

22、 url(img/unchecked.gif) no-repeat 0px 0px; </style> 继续添加对输入密码长度的验证规则： $(document).ready(function() $("#signupForm").validate( rules: firstname:"required", lastname:"required", username:"required", password: required:true, minlength:4, maxlength:15 , conf

23、irm_password: required:true, equalTo:"#password" , email: required:true, email:true , messages: firstname:" 必填项", lastname:" 必填项", username:" 必填项", password: required:" 必填项", minlength:jQuery.format(" 密码长度不少于 0 位 "), maxlength:jQuery.format

24、(" 密码长度不超过 0 位 ") , confirm_password: required:" 必填项", equalTo:" 密码不一致" , email: required:" 必填项", email:" 格式有误" ); ) 使用remote 可以通过 event 指定触发效验方式（ 可选值有 keyup( 每次按键时 ) ， blur( 当控件失去焦点时 ) ，不指定时就只在按提交按钮时触发 ） $(document).ready(function() $("#signupF

25、orm").validate( event:"keyup" | "blur" ) ) 如果通过指定 debug 为 true 则表单不会提交只能用来验证 ( 默认为提交 ) ，可用来调试 $(document).ready(function() $("#signupForm").validate( debug:true ) ) 如果在提交前还需要进行一些自定义处理使用 submitHandler 参数 $(document).ready(function() $("#signupForm").valida

26、te( SubmitHandler:function() alert( "success"); ) ) JQuery笔记（表单验证） 二 收藏 验证: <! DOCTYPE HTML PUBLIC "-/W3C/DTD HTML 4.01 Transitional/EN" "/TR/html4/loose.dtd" ><html> <head> <!-<style>label.valid background: url(' no-repeat

27、; height:16px; width:16px; display: block; position: absolute; top: 4px; left: 152px; </style>-> <script src=" <script type="text/javascript" src=" <script type="text/javascript" src=" <script type="text/javascript"> jQuery.validat

28、or.setDefaults( debug : true , success : "valid" ); </script> <script> $(document).ready( function () / 1 $( "#myform" ).validate( rules : fruit : "required" , errorPlacement : function (error, element) /if ( element.is(":radio") ) error.appendTo(e

29、lement.parent(); ); / 2 $( "#myinput" ).rules( "add" , required : true , minlength : 2, messages : required : "Required input" , minlength : jQuery.format( "Please, at least 0 characters are necessary" ) ); / 3 $( ":radio" ).each( function () $( this

30、 ).rules( "add" , required : true , minlength : 2, messages : required : "Required input 必填 " , minlength : jQuery.format( "Please, at least 0 characters are necessary" ) ) ); );</script> </head> <body> <form id="myform"> <table bord

31、er="1"> <tr> <td> <label for="fruit"> Please select a fruit </label> </td> <td> <select id="fruit" name="fruit" title="Please select something!"> <option value=""></option> <option

32、 value="1"> Banana </option> <option value="2"> Apple </option> <option value="3"> Peach </option> </select> </td> </tr> <tr> <td> <input type="text" id="myinput" /> </td> <

33、;td> <input type="submit" value="submit!" /> </td> </tr> <tr> <td> <input type="radio" name="radio3"> radio3 <input type="radio" name="radio3"> radio3 </td> </tr> <tr> <td>

34、; <input type="radio" name="radio2"> radio2 <input type="radio" name="radio2"> radio2 </td> </tr> <tr> <td> <input type="radio" name="radio1"> radio1 <input type="radio" name="radi

35、o1"> radio1 </td> </tr> </table> </form> </body></html>参考：rules( ) Returns: Options Return the validations rules for the first selected element. rules( "add", rules ) Returns: Options JQuery笔记（表单验证） 三 收藏 Test for jQuery validate() plugin < typ

36、e="text/javascript"> jQuery Validation Plugin DemoLogin FormUsername Password 回到主页query-plugin-validation： |下载 |Changelog |Demos |Documentation 点击Login后 如下图： 代码 errorcontainer-demo_1.htmlview plaincopy to clipboardprint?<?xml version="1.0" encoding="ISO-8859-1" ?&

37、gt; <!DOCTYPE html PUBLIC "-/W3C/DTD XHTML 1.0 Transitional/EN" "/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ut

38、f-8" /> <title>Test for jQuery validate() plugin</title> <link rel="stylesheet" type="text/css" media="screen" href="css/screen.css" mce_href="css/screen.css" /> <mce:script src=" mce_src=" <mce:script type=&

39、quot;text/javascript" src=" mce_src=" <mce:script type="text/javascript" src=" mce_src=" <mce:script type="text/javascript"src="http:/jquery.bassistance.de/validate/lib/jquery.metadata.js"></mce:script> <mce:style type="te

40、xt/css"><!- /* .cmxform fieldset p.error label color: red; div.container background-color: #eee; border: 1px solid red; margin: 5px; padding: 5px; div.container ol li list-style-type: disc; margin-left: 20px; div.container display: none .container label.error display: inline; */ form.cmxf

41、orm width: 30em; form.cmxform label.error display: block; margin-left: 1em; width: auto; -></mce:style><style type="text/css" mce_bogus="1">/* .cmxform fieldset p.error label color: red; div.container background-color: #eee; border: 1px solid red; margin: 5px; padd

42、ing: 5px; div.container ol li list-style-type: disc; margin-left: 20px; div.container display: none .container label.error display: inline; */ form.cmxform width: 30em; form.cmxform label.error display: block; margin-left: 1em; width: auto; </style> <mce:script type="text/javascript&qu

43、ot;><!- / only for demo purposes $.validator.setDefaults( submitHandler: function() alert("submitted! (skipping validation for cancel button)"); ); $().ready(function() $("#form1").validate( errorLabelContainer: $("#form1 div.error") ); /* var container = $('d

44、iv.container'); / validate the form when it is submitted var validator = $("#form2").validate( errorContainer: container, errorLabelContainer: $("ol", container), wrapper: 'li', meta: "validate" ); */ $(".cancel").click(function() validator.resetFo

45、rm(); ); ); / -></mce:script> </head> <body> <h1 id="banner"><a href="http:/bassistance.de/jquery-plugins/jquery-plugin-validation/" mce_href="http:/bassistance.de/jquery-plugins/jquery-plugin-validation/">jQuery Validation Plugin</a&

46、gt; Demo</h1> <div id="main"> <form method="get" class="cmxform" id="form1" action=""> <fieldset> <legend>Login Form</legend> <p> <label>Username</label> <input name="user" title=&quo

47、t;Please enter your username (at least 3 characters)" class="required:true,minlength:3" /> </p> <p> <label>Password</label> <input type="password" maxlength="12" name="password" title="Please enter your password, between

48、 5 and 12 characters" class="required:true,minlength:5" /> </p> <div class="error"> </div> <p> <input class="submit" type="submit" value="Login"/> </p> </fieldset> </form> <!- our error conta

49、iner -> <!-<div class="container"> <h4>There are serious errors in your form submission, please see below for details.</h4> <ol> <li><label for="email" class="error">Please enter your email address</label></li> <l

50、i><label for="phone" class="error">Please enter your phone <b>number</b> (between 2 and 8 characters)</label></li> <li><label for="address" class="error">Please enter your address (at least 3 characters)</label&g

51、t;</li> <li><label for="avatar" class="error">Please select an image (png, jpg, jpeg, gif)</label></li> <li><label for="cv" class="error">Please select a document (doc, docx, txt, pdf)</label></li> </ol&

52、gt; </div>-> <!-<form class="cmxform" id="form2" method="get" action=""> <fieldset> <legend>Validating a complete form</legend> <p> <label for="email">Email</label> <input id="email"

53、name="email" class="validate:required:true,email:true" /> </p> <p> <label for="agree">Favorite Color</label> <select id="color" name="color" title="Please select your favorite color!" class="validate:requi

54、red:true"> <option></option> <option>Red</option> <option>Blue</option> <option>Yellow</option> </select> </p> <p> <label for="phone">Phone</label> <input id="phone" name="phone" class="some styles validate:required:true,number:true, rangelength:2,8" /> </p> <p> <label for="address">Address</label> <input id="address" name="address" class="some other styles validate:require