thanks for the comments.
I used the window pop-up because I hate how a site that only uses a small area looks when someone is using a 22" monitor with a high resolution and his browser window is open all the way. Then the site is this little lost thing in the upper left corner.
In turn does anyone know how to resize someone's window to a specific size. Not a pop-up just an regular index page like the first page on my site ? Is there any script that can do that ? If I could do that and set the person's browser window to a size that fit the site, I would not use that pop-up style design.