Guys, I am looking for any pop up software for a pop up that won't be blocked by the browser to be displayed when a visitor is leaving my site.

I know how annoying pop up can be but I am sure my visitors will not have any problem with it, they are even asking for it, I need it for an opt in list.

Please help, your comment is appreciated.

http://www.zachleat.com/web/2008/04/...nbeforeunload/ for the event to use and for my CSS method http://www.candsdesign.co.uk/article...-a-disclaimer/