I have placed .gif banner on my forum,but when browser size reduces,add would go to side .
I would like to ask anyone,could anybody please explain,what code modification I need to have,to show different size .gif or .jpeg banners when browser size reduces.
I was reading one of the threads for a google adsense,but very difficult to understand.
I would really appreciate if anyone could make as simple as possible tutorial for this question,as I also think,that would help a lot of members also.
P.S don't want to install any add ons.
Thanks very much in advance.