I'm guessing that you are passing data from one page to another and when you do you can see the results in the address bar. If that is true then read on.
There are two ways of passing data from one page to another.
GET: This is a bit simpler. It takes the address of the next page and tacks on some variables so you get::
http://www.hmmm.com?page=1&person=chuck
::this is a pretty easy way to do it but shows the results of your form/query.
POST: This is what you'll want. This method takes your form/query and adds it to the actual page so that as it gets sent back to the server and returns, it is hidden from users. You'll get::
http://www.hmmm.com
::but yet the page you see will know about data sent from the previous page.
This choice will be made when you add your <FORM> tag. You will want to add <FORM ACTION="whatever.htm" METHOD="POST" NAME="somename"> I belive you have ...METHOD="GET"... now.
Have fun!!