常用正则

// 身份证验证  

//身份证正则表达式(15位) 
isIDCard1=/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/; 

//身份证正则表达式(18位) 

isIDCard2=/^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{4}$/;

// 护照验证

jQuery.validator.addMethod("isPassport", function(value, element, type) {
 if ($(type).val() === '2') {
 var re1 = /^[a-zA-Z]{5,17}$/;
 var re2 = /^[a-zA-Z0-9]{5,17}$/;
 return this.optional(element) || (re2.test(value)) || re1.test(value);
 } else {
 return true;
 }
}, "护照格式不正确");

// 港澳通行证验证

jQuery.validator.addMethod("isHKMacao", function(value, element, type) {
 if ($(type).val() === '3') {
 var re = /^[HMhm]{1}([0-9]{10}|[0-9]{8})$/;
 return this.optional(element) || (re.test(value));
 } else {
 return true;
 }
}, "港澳通行证格式不正确");

//营业执照

/^/d{15}$/

// 台湾通行证验证

jQuery.validator.addMethod("isTaiwan", function(value, element, type) {
 if ($(type).val() == "4") {
 var re1 = /^[0-9]{8}$/;
 var re2 = /^[0-9]{10}$/;
 return this.optional(element) || (re1.test(value)) || (re2.test(value))
 } else {
 return true;
 }
}, "台湾通行证格式不正确");



http://www.jb51.net/tools/regex.htm