Unblockable background pop under -- 2

Hello , We need simple code of popunder . We have several demands : 1. It should work across all browsers including smartphones. 2. It should bypass any adblock extensions.- it should open the pop under even if the user have adblock or popup blocker. 3. it should open the pop under in background but in full screen (focus should be return to the website) 4. Should have a customized value to set number of pop under per session. Thanks