url verification

hi i have create this code for url verification
can u help me to test it?


isUrl = /(http\:\/\/www\.\w+\.\w+$)/;




Also help me to fix this problem
http://www.in.gr (is ok)
http://utopia.gr (not ok)
http://www._.gr (not ok)
http://www.utopia.cs.teiath.gr (not ok)