rather than the user clicking on a link?
To be exact we currently use Lightbox CSS to launch forms into Modal Windows, which you can see from this Web site:
realnewspost: A News site powered by the Social Network to get the TRUTH out
when you click on the Sign-in link at the top.
Also please specify whether the content of the Modal window based on your suggested solution needs to be a separate Web page or whether it can be content (Text/Image link) from the page which launched the Modal window, which is preferred.