78193 Url Popunder Script

I want a simple script like a popunder script that will rotate Url's. See this Example: [login to view URL] When you login to this site, another site pops under it. If you refresh the screen, a different Url pops under it. The script will rotate Url's that I decide to have in the rotation. I should be able to control: -Which Urls are included -How many total exposures a Url receives -Which Url's get the most "weight" Include a simple, basic but effective control panel. This should be simple and inexpensive. I will want to use this script on one or more Url's. Please show any examples you may have. The winning bidder will receive a 10 rating. I will pay via PayPal after I am satisfied with your script. I can install basic scripts with instructions, otherwise installation shall be included. All you great programmers this should be very easy. I am open to suggestions. Thank you for bidding! Bob Westbury