Dreamweaver rollover javascript

You know something? I don’t like Dreamweaver’s rollover script too much, because it doesn’t really preload. Whenever I load a webpage with rollovers, and I think it’s finished loading, then I roll over an image and the IE5 Windows icon starts revolving again, I know it’s Dreamweaver. Better to write your own javascript rollovers. If only I knew how; I still haven’t gotten down to self-studying all those technologies I want to learn. Not that I need javascript rollovers right now; in the interests of conserving bandwidth, I’m using CSS.