I need a bit of help here on how this is done..

I run a hosting company free web site hosting which is ad supported with a 468x60 banner.

Now i understand that a 468x60 banner can put people off so what i have decided to do is change the banner ad to something that would not look out of place on users sites.

I was thinking of something like on this site the inet bar at the very top of this site. Now how would i do this? i can design the ad in a php page but what code would i need to use to supply to our member for the ad to show in there sites?

Or is there a script of some sort that would do this?

Thanks for any help..

Simply stick your ad in a HTML page, and give your users the code for an iFrame or Javascript Include...

The iframe is what i use for the banner...

How would the javascript include work? can you supply the code please?