Hey guys, I'm trying to accomplish something similar to what the develop on this site did: http://backlinkwatch.com/

When you click on the text area, a clickable image, with a 50% black opacity background overlay, and an exit either through a link or clicking outside of the box, shows up.

I want to accomplish the same thing, but have the image popup show up on the page load instead of requiring a click of the text area. In addition, I would like this popup only once to each IP address; ie, if you visit a page on my site, this will show up, but if you close it and refresh the page or visit another page on the site a cookie will be stored that knows its already been opened once and it won't try to do it again.

Thanks to anyone who can help me with this!