Allows exaclty 4 groups of digits in the range 0..255 seperated by . characters

valida fechas de 19## a 20##, en formato yyyy-MM-dd

ContentPlace Xml Tag

Matches CSS Length Units according to: http://www.w3schools.com/cssref/css_units.asp

Accepts only integer or Flating values upto 3 decimals. To accept n decimals change (1,n)

nao

This regex checks if a user has input 4 digit year integer.

This simple regex checks if a user has input correct YYYY format.

Validates that a DNS hostname is well-formed only. You will still need to check that the overall length of the hostname, including the implied trailing "." (if not present), does not exceed 255 bytes.

Pattern used to filter URL origin (protocol:host) for yFrame.

solution for matching

for [d:] and [q:]