jQuery Validate
jQuery Validate 插件为表单提供了强大的验证功能，让客户端表单验证变得更简单，同时提供了大量的定制选项，满足应用程序各种需求。
1、导入 js 库
<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>
2、默认校验规则
序号 规则 描述
1 required:true 必须输入的字段。
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。
例子：
$().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"
}
})});
3.特别注意
对于accept的用法 accept：“MIME types”
具体的可能用到的MINIEType如下：
.dotx,application/vnd.openxmlformats-officedocument.wordprocessingml.template
.docx,application/vnd.openxmlformats-officedocument.wordprocessingml.document
.xlsx,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.pptx,application/vnd.openxmlformats-officedocument.presentationml.presentation
.doc,application/msword
.dot,application/msword
.xls,application/vnd.ms-excel
.ppt - application/mspowerpoint
.ai - application/postscript
.aif - audio/x-aiff
.aifc - audio/x-aiff
.aiff - audio/x-aiff
.asc - text/plain
.au - audio/basic
.avi - video/x-msvideo
.bcpio - application/x-bcpio
.bin - application/octet-stream
.c - text/plain
.cc - text/plain
.ccad - application/clariscad
.cdf - application/x-netcdf
.class - application/octet-stream
.cpio - application/x-cpio
.cpt - application/mac-compactpro
.csh - application/x-csh
.css - text/css
.dcr - application/x-director
.dir - application/x-director
.dms - application/octet-stream
.doc - application/msword
.drw - application/drafting
.dvi - application/x-dvi
.dwg - application/acad
.dxf - application/dxf
.dxr - application/x-director
.eps - application/postscript
.etx - text/x-setext
.exe - application/octet-stream
.ez - application/andrew-inset
.f - text/plain
.f90 - text/plain
.fli - video/x-fli
.gif - image/gif
.gtar - application/x-gtar
.gz - application/x-gzip
.h - text/plain
.hdf - application/x-hdf
.hh - text/plain
.hqx - application/mac-binhex40
.htm - text/html
.html - text/html
.ice - x-conference/x-cooltalk
.ief - image/ief
.iges - model/iges
.igs - model/iges
.ips - application/x-ipscript
.ipx - application/x-ipix
.jpe - image/jpeg
.jpeg - image/jpeg
.jpg - image/jpeg
.js - application/x-javascript
.kar - audio/midi
.latex - application/x-latex
.lha - application/octet-stream
.lsp - application/x-lisp
.lzh - application/octet-stream
.m - text/plain
.man - application/x-troff-man
.me - application/x-troff-me
.mesh - model/mesh
.mid - audio/midi
.midi - audio/midi
.mif - application/vnd.mif
.mime - www/mime
.mov - video/quicktime
.movie - video/x-sgi-movie
.mp2 - audio/mpeg
.mp3 - audio/mpeg
.mpe - video/mpeg
.mpeg - video/mpeg
.mpg - video/mpeg
.mpga - audio/mpeg
.ms - application/x-troff-ms
.msh - model/mesh
.nc - application/x-netcdf
.oda - application/oda
.pbm - image/x-portable-bitmap
.pdb - chemical/x-pdb
.pdf - application/pdf
.pgm - image/x-portable-graymap
.pgn - application/x-chess-pgn
.png - image/png
.pnm - image/x-portable-anymap
.pot - application/mspowerpoint
.ppm - image/x-portable-pixmap
.pps - application/mspowerpoint
.ppt - application/mspowerpoint
.ppz - application/mspowerpoint
.pre - application/x-freelance
.prt - application/pro_eng
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