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Tests for valid HTML hexadecimal color codes. The # symbol is optional. And it will except either the 3 digit form for the 216 Web safe colors, or the full 6 digit form. I am use it on my site to allow users to customize the site's colors.

Matches major credit cards including: Visa (length 16, prefix 4), Mastercard (length 16, prefix 51-55), Discover (length 16, prefix 6011), American Express (length 15, prefix 34 or 37). All 16 digit formats accept optional hyphens (-) between each group of four digits.

Accepts an unsigned integer number. Also matches empty strings.

US Phone number that accept a dot, a space, a dash, a forward slash, between the numbers. Will Accept a 1 or 0 in front. Area Code not necessary

Will match the following date formats: Preceded by a Space, Left-parentheses, or at the beginning of a line. Followed by a Space, Right-parentheses, or Colon(:), word boundary or End of line. Can have / or - as separator. Accepts 2 digit year 00-99 or 4 digit years 1900-2099 (can modify to accept any range)

This just a minor mod to Steven Smith's credit card re to accept spaces as separators, as well as return the four parts of the card. [Updated Oct-18-2002 to work with Diners Club/Carte Blanche (prefix must be 36, 38, or 300-305)]

Accepts 1-2 digits followed by a slash followed by 2-4 digits. Useful for numeric month/year entry.

Date expressions that matches MM/DD/YYYY where MM and DD must be two digits and zero padded. Validates correctly for all months except February, which it assumes to always have 29 days. The "/" separator is optional.

The following validates dates with and without leading zeros in the following formats: MM/DD/YYYY and it also takes YYYY (this can easily be removed). All months are validated for the correct number of days for that particular month except for February which can be set to 29 days. date day month year

Matches standard 5 digit Brazilian Postal Codes (CEP), or the CEP + 3 digits (distribution identifiers - suffix). For more info refer to: http://www.correios.com.br/servicos/cep/Estrutura_CEP.cfm (in portuguese).

Other expression to standard 5 digit Brazilian Postal Codes (CEP), or the CEP + 3 digits (distribution identifiers - suffix). The diference of the original one, is that the "." is mandatory.

This matches floating point expression in a more rigorous way - accepts both exponent as well as non exponent notations.

This expression validates dates in the ITALIAN d/m/y format from 1/1/1600 - 31/12/9999. The days are validated for the given month and year. Leap years are validated for all 4 digits years from 1600-9999, and all 2 digits years except 00 since it could be any century (1900, 2000, 2100). Days and months must be 1 or 2 digits and may have leading zeros. Years must be 2 or 4 digit years. 4 digit years must be between 1600 and 9999. Date separator may be a slash (/), dash (-), or period (.) Thanks to Michael Ash for US Version

This will grep for a valid MAC address , with colons seperating octets. It will ignore strings too short or long, or with invalid characters. It will accept mixed case hexadecimal. Use extended grep.

this expression validates a date-time field in European d/m/y h:m:s format. It is a european variation of Michael Ash's date-validation expression in this library. The days are validated for the given month and year. Leap years are validated for all 4 digits years from 1600-9999, and all 2 digits years except 00

Most email validation regexps are outdated and ignore the fact that domain names can contain any foreign character these days, as well as the fact that anything before @ is acceptable. The only roman alphabet restriction is in the TLD, which for a long time has been more than 2 or 3 chars (.museum, .aero, .info). The only dot restriction is that . cannot be placed directly after @. This pattern captures any valid, reallife email adress.

Validar o do CEP Brasileiro com 8 posicoes podendo usar mascara . e - ou somente numeros

Many currency expresssions allow leading zeros, thus $01.40 passes thru them. This expression kills them, except for 0 in the one's column. Works with or without commas and/or dollar sign. Decimals not mandatory, unless no zero in ones column and decimal point is placed. Allows $0.00 and .0 Keywords: money dollar currency

simple expression for excluding a given list of characters. simply change the contents of [^] to suite your needs. for example ^(/w|/W|[^<>])+$ would allow everything except the characters < and >.

This time validation expression accepts an hour between 1 and 9 (with optional leading zero) and minutes between 01 and 59. This is primarily for use with an AM/PM drop down list or radio button.