Our website currently has a lightbox that shows up every time the user enters the website (and views any webpage). We would like to change the behavior of the lightbox so that once the user signs up (fills out a contact form with their email address) the lightbox does not show again.
In order to do this we envision setting a cookie on the user's machine once he reaches the success page for the signup. The cookie should have an expiration of 365 days. If the cookie is set the user will not see the shadowbox again.
We currently use a Joomla plugin in order to show the lightbox, so you would have to make changes to the existing plugin.
This is the shadowbox joomla plugin we are using:
[url removed, login to view]