Hi all. I am developing an application where the user is giving me a url. I already have some basic input format validation to enforce the type of url input they can give but I'm looking to go a little bit further. What I would like to do in a perfect world is try to access the given URL and see if it can actually be accessed (not throw a 404). If it can then I want to let my application continue. If not (404 or something similar) then halt and force them to re-enter. If there is a sneaky way to do this I would be most grateful. Thanks a million.