OT - javascript question..

Sorry for the off topic post, but this is by far the most experienced list I've found. I've got a php page that show all the .gif and .jpeg files in an directory via a form based drop down menu. On the same page, I've also got a link that opens a new window, and allows the user to upload an image to that same directory. Is there any way, when the upload window is closed, to force a reload of the other page, so the dynamic pop-up reflects the recent upload? Thanks in advance, Kelly