Depending on the design program you utilize for your site (I use Front Page 2000 and Dream weaver) you can control effects of hover buttons and the like. FP 2000 calls them components; and effects on the components are controlled via the properties function.
Hope this helps.
>Hi, I wonder if anyone could help...
>firstly, do an onmouseover style thing which highlights the image/link in question.
>But secondly, and most importantly, to also induce another picture on the other side of the screen in which I can put secondary information about the link.