Changing image with swf

#banner {width: 949px;padding:25px 0px 10px 20px;font:normal 30px tahoma, Impact, Arial Black, sans-serif;background:url(images/banner-top1.jpg) repeat-x;margin:0px 0px 0px -2px;height:113px;}

I am relly newbie. Above code is in css blog. I want to change “banner-top1.jpg” with swf file.

How can I do that?

Thanks very much for your help

check the following website.

I think this will help you.