newbie question

[mjh]

I created two roll-over bitmap images (in Corel Photopaint, v. 11),
each of which works fine when placed within its own web page.
However, when I combine the code into one web page the roll-over
function stops working in each image; the hot-spots/links are fine.
What am I missing here? Being new to JavaScript, I'm sure it's
something simple....

thanks