sub domain regular expression

[Jassim Rahma]

I have www.mydomain.com I want to have an expression which validate a subdomain like this: www.mydomain.com/SUBDOMAIN User will enter the SUBDOMAIN only in the textbox and I want to validate so it will be valid url. y

[ziggyfish]

You want us to do your work? This isn't a complex expression, so RTFM.