A form/direct action question

I've got a form, and I'd like to have it perform a get operation  
against a direct action method.  I've figured nearly everything out  
-- my only question is how to prevent the controls on the page from  
including themselves in the submit automatically?  ie, I end up with  
a URL that looks like:
/wa/mystuff?7.1=0&7.3=5&myParm=myvalue&myotherparm=something

How do I "hide" the 7.1 & 7.3 controls from appearing in the URL?