annasue,
This is definitely a javascript error. If you look at the source code for the page, you can see that for each menu button you have at the top of your page, there is an MM_swapImage() function being called when you mouseover, and MM_swapImgRestore() function called when you mouseout. There is also an MM_preloadImages() function being run when the page loads.
Those functions are not defined anywhere on the page. Looks like Dreamweaver has let you down.
Being a PHP forum, we really can't walk you down the road to recovery on this one. But at least you know where the problem is, and can begin to troubleshoot it.
Good Luck!