reg-expression for URL check

reg-expression for URL check And here is the rest of it.

^(http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?[a-z0-9A-Z]+([\-\.]{1}[a-z0-9A-Z]+)*\.[a-zA-Z]{2,5}(:[0-9]{1,5})?(\/.*)?$