http://www.pageresource.com/jscript/jlinktut.htm I found it on that page. Go there, then click away, or close the page. Does anyone know what this javascript do? http://tags.expo9.exponential.com/tags/PageResourcecom/HTML/tags.js I think that's what causes the pop under. I don't understand the code though. How can I use it to generate my own pop under when they click away?