exit optin popup when mouse moves to close page? whats this site using?

3 replies
just saw this landing page for a webinar and the guy has an exit optin that pops up when you move your mouse up to the URL bar or the "X" button

http://www.robertallen.com/webinars/ms-seminars/

does anyone know what he is using or how to do this?
#close #exit #mouse #moves #optin #page #popup #site

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