Unblockable pop-under Script

We are currently looking for a javascript expert to develop an unblockable pop-under script that opens a popounder when a user opens our website. The script should be able to bypass the most common pop-under blockers. If necessary to bypass a certain pop-under blocker the pop-under can also appear "on click" after the first click of the user. The script should be working with the current versions of all common browser versions and pounder blockers: - IE 7-9 - Firefox - Safari - Chrome The script should be updated on a regular basis to ensure ongoing functionality when browsers / blockers are updated (for additional remuneration). The script should only be executed once per session so the user only gets a pop-under once per session. The script should: - either user the redirect tag from our adserver to open the webpage of an advertiser - or open a static html page on our server with the ad code of our adserver Full assistance from our tech team will be provided if necessary.