How to get lost of the variable after a ? in a URL?

From: TiM (tim.van.kerckhove_NOSPAM__at_pandora.be)
Date: 10/29/04 

Date: Fri, 29 Oct 2004 15:34:42 GMT

Hi all,

This is my URL after deleting a file or folder:
http://localhost/project/index2.php?delete=dir

But now is my problem that if I make a new directory this URL stays but I
want it like this then: http://localhost/project/index2.php
Same problem when I do an upload.
I hope someone can help me.
Greetz