Here are a couple of alternatives as well...
Click for the following examples and code...
traditional Centered pop:
this will open a sized centered window, you will be required to make a target page for each link:
Centered pop with iframe:
this will open a sized centered window with a inline frame, you will be required to make a target page for each link.
Useful for large documents
that may not fit in target.
Change image pop:
Allows you to load a differnet image into the the same target window.
Great for product close ups or