I have 3 methods, the third one is the one i'm interested in doing a bit more thinking about , as it could be a great popup tool.
Turn on your popup blockers and try these 3.
These are totally safe links.
<center><b>POPUP ON ENTER<br>
http://s89164764.onlinehome.us/gfypop1.html
<center><b>POPUP ON EXIT<br>
http://s89164764.onlinehome.us/gfypop2.html
<center><b>1 UN-CLOSABLE POPUP APPLET AD<br>
<i></b>In this demo you can close the popup by clicking back to the main window and pressing a keystroke in the window and it will close, but dont close the window without first closing the popup , or it will stay around.</i>
http://s89164764.onlinehome.us/test/
Im interested in the success rate.
Its been tested on the yahoo and google popup blockers and it gets around both those on xp and latest i.e.