Hidden Form Variables

This isn't exactly a PHP question, but I don't know where to ask it, and it's closely related... I have a form which saves some PHP variables as hidden properties of a field for maintaining a user login. However, it's contents arn't posted to sites linked via <a href=...></a> tags. If someone could tell me how to do this without using cookies that'd be great (I'm trying to provide an alternative for those people who's sysadmin disabled cookies - usually in a public place such as a library). aka my main page looks something like: <html><head><title> Page Title </title></head> <body> <form method="POST"> <input type="hidden" name="username" value="MrMonkey"> <input type="hidden" name="password" value="****"> </form> ... some webpage html ... <a href="otherpage.php">Goto the other page</a><br> <a href="http:\\www.microsoft.com\">Microsoft</a> </body></html> I'd want the hidden data posted to the first link but not the second (although it won't really matter since I'll be changing from sending the password to sending a unique randomized session id). I guess I could have a script that forwarded to M$ site in this example, <a href="forward.php?url='http:\\www.microsoft.com'>, but I also will be having users post HTML to my site, and I can't depend on them to remember that every time... feedback appreciated, thanks! -Mike (aka MaulingMonkey at http:\\www.leetoldman.com (down for modifications) and http:\\www.weirdstudios.com\ (being redone as we speak) )