Server IP validation pattern doesn't work correctly

[GoogleCodeExporter]

What steps will reproduce the problem?

Using of pattern either 
(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{
2}|2[0-4][0-9]|25[0-5])
or 
(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-
9][0-9]?)(:\d{1,5})?

What is the expected output? What do you see instead?
matching with 123.34.1333.23 or any other wrong IP address should give false 
but it gives true 

What version of the product are you using? On what operating system?
Latest one

Please provide any additional information below.

Original issue reported on code.google.com by lev.mere...@googlemail.com on 10 Mar 2011 at 6:49