I am trying to make a cookie that should contain a number value. It all work fine, unless the form that sends the info to my receiver page sends and empty string. Then something strange happens. It does not seem to be empty, so my error checker does not detect that it is empty (null or ""). So when i try to make the string into an integer the server get angry with me. If there is a good way to search a string for characters, in my case, return false unless it is a number (0,1,...9), it would help a lot. Or if there is a way to make sure the form does not send empty strings in the first place.
Ps. My code is correct, so I won't post it.
Thanks for the help!