Lightbox window stretches horizontally
I have a lightbox where the prev/next buttons are images on either side of the browser window. They are absolutely positioned with negative values (-138px) so that only a portion of the buttons are visible. So now the horizontal width of the overlay is wider than the browser window. I've set the CSS to overflow:hidden for both the overlay and the btnBox, but that didn't do anything. How do I constrain the horizontal width to not exceed the width of the window? I know it has something to do with the negative margin, but I'm really new to jQuery and have no idea how to proceed.
I have it in a staging area:
http://www.vicesbyproxy.com/staging/cb/studio.html
username: helper
password: bacon
You have to wait a few seconds for the big image to fade and the thumbnails to appear (not my idea).