[SOLVED] Disable Submit Button If Text Field is Empty

[eRott]

Sorry, I posted this in the wrong section initially and am unsure of which would be the best way to do it, with Java or Ajax. Here's my problem: (please reply in that thread if possible. Sorry for the mix-up)

 

http://www.phpfreaks.com/forums/index.php/topic,138376.0.html

 

Thanks.