收集常用的正则表达式，欢迎补充。

1.匹配IP地址

2.匹配URL

1. isURL/^((http|https):\/\/(\w+:{0,1}\w*@)?(\S+)|)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/ 3.匹配全汉字
   @H_301_8@
   1. isChina/^[\u4E00-\u9FA3]{1,}$/ 4.匹配身份证号码
      @H_301_8@
      1. isIDCard/(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/ 5.匹配手机号码
         @H_301_8@
         1. isPhoneNum/^0?(13[0-9]|15[012356789]|18[0236789]|14[57])[0-9]{8}$/ 6.匹配邮箱
            @H_301_8@
            1. isEmail/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/ 7.匹配数字
               @H_301_8@
               1. isNum/^-?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/ 8.匹配日期
                  @H_301_8@
                  1. isDate !/Invalid|NaN/(new Date).toString()); 9.匹配字母和下划线开头，允许n-m字节，允许字母数字下划线
                     @H_301_8@
                     2. isAccountValid,mnvar _n = n-1 _m m;RegExp("^[a-zA-Z_][a-zA-Z0-9_]{"+_n+","_m"}$" 调用方法：
                        @H_301_8@
                        var isEmail isEmail($("#input1"val());alertisEmail);//true orfalse

                        以上的表达式均返回true or false。true为真，false为假。欢迎补充