GET and POST differ in a couple of ways. POST's size limit is much larger than GET (as you've already seen). GET paramaters apear at the end of the URL after the ? while POST parameters are hidden. If your CGI script (which I'm assuming is in Perl), is using CGI.pm then you shouldn't have to change anything in your CGI code. All you should have to do is change method=GET to method=POST (or add method=POST) to the <form> tag.