Java/HTML/CSS Code for random banner pop-ups

Hello! Is there a code to make a banner randomly pop up, on different pages? I also need it to only let a member click it every 15 Mins, and i need it to give the member a random code, so they can PM me and i can add items to there profile.

yeah i never heard of anything like this?

you can have a banner rotor to where it can have a different banner show each time they go to a different page, but as far as it allow it to be clicked every 15 min and giving them a code to pm you/add stuff to your profile?

Yeah dunno about that. seems a little far fetched to me, unless there is abetter way you can explain on exactly how it is to work and what it is superposed to do?

I really just need an image with a link that randomly pops up every 15 minutes.....