Javascript Pop-Under Script needed

Hi, we need a reliable Pop-Under script that we can integrate into our websites to display advertisements. Here are the main requirements: - script must work on all browsers, Chrome, Firefox, Safari, Opera, IE, Edge, all Mobile browsers - script shall open up only once per day if there are more than 1 web sessions from the user - script should display different types of ads depending on the screen size of the user (mobile phones display different ads than desktops) - script should display ads randomly from a set of different advertisements (i.e. if we have 4 different desktop ads, script should pick 1 in random order) - advertisement links need to be stored in a separate, non-public file - window size for desktop is 800x1000 (changeable), mobile is full size Please contact us if some items are unclear. We're open to further suggestions to enhance functionality. We currently use a pop-under script but it's not compatible with current browsers anymore. Many thanks! Mike