When I said make a gif and use the existing html code I meant to make a gif image (gif is a different file format like .bmp, .jpg, .png). By "use the existing html code, I was saying to use the html we have been discussing, I dind't want to confuse that with the javascript or php code I said that would be needed to rotate different images on page loads.
If you want to have the image rotate images every couple of seconds you have to make a gif, or animated images. It will have 3 frames, one with each image, and it will cycle through the frames based on the time you set them to. You will need a program, such as photoshop to do this, there are some free ones out there you can make a gif with such as The Gimp.
I just did a google search and found this one too, might be worth a try
http://www.creabit.com/gif/ http://www.ulead.com/ga/runme.htm http://www.blumentals.net/egifan/
Most or all are just trials, but they should fit your needs