dates only in the future

Good afternoon, I'm looking for a function which enables me to allow user only to enter those dates which are still to come. In my head I have three <select> things... one for day, one for month and one for year. In order to prevent the user from submitting the form with the date which is in past, I need probably Javascript. Am I correct? I rather prefer to keep my site Javascript free and therefore it would be great if somebody has already written such a function and would be ready to share it with me/others. If not, any ideas how to start... ???? TIA & happy coding, Kristjan Kanarik P.S. Please put kanarik@zzz.ee to CC: line since I'm only on the digest.