javascript正则表达式检验汇总

/*********************************************************************************?
* abc.js?
* javascript正则表达式检验?
**********************************************************************************/?

//校验是否全由数字组成?
function isDigit(s)?
{?
var patrn=/^[0-9]{1,20}$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验登录名：只能输入5-20个以字母开头、可带数字、“_”、“.”的字串?
function isRegisterUserName(s)?
{?
var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验用户姓名：只能输入1-30个以字母开头的字串?
function isTrueName(s)?
{?
var patrn=/^[a-zA-Z]{1,30}$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验密码：只能输入6-20个字母、数字、下划线?
function isPasswd(s)?
{?
var patrn=/^(\w){6,20}$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验普通电话、传真号码：可以“+”开头，除数字外，可含有“-”?
function isTel(s)?
{?
//var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?(\d){1,12})+$/;?
var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验手机号码：必须以数字开头，除数字外，可含有“-”?
function isMobil(s)?
{?
var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验邮政编码?
function isPostalCode(s)?
{?
//var patrn=/^[a-zA-Z0-9]{3,12}$/;?
var patrn=/^[a-zA-Z0-9 ]{3,12}$/;?
if (!patrn.exec(s)) return false?
return true?
}?

//校验搜索关键字?
function isSearch(s)?
{?
var patrn=/^[^`~!@#$%^&*()+=|\\\][\]\{\}:;'\,.<>/?]{1}[^`~!@$%^&()+=|\\\][\]\{\}:;'\,.<>?]{0,19}$/;?
if (!patrn.exec(s)) return false?
return true?
}?

function isIP(s) //by zergling?
{?
var patrn=/^[0-9.]{1,20}$/;?
if (!patrn.exec(s)) return false?
return true?
}