Wordpress exit pop based on time on the site

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
Exit pop based on time on site

I want to have the exit pop trigger when someone is leaving the site.
But I want the exit pop to display diff exits based on how long they were on a page.
So the exit pop would be setup for diff pages for the amount of time the user was on that page.
If they are on page x less than x sec it would show popup A But if they were on that page greater than x secs it would show popup B

Skills required:
PHP, Software Architecture, Wordpress
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