"tabbed type" menus and iframes

[lee_a]

Ok I like the idea of a tabbed menu but I can't find/figure out one for my peticular needs. I curently have a vertical menu going down the left side of my page that is made up of GIF images i created all contained in a one table cell. These buttons already implement an onmouseover/onmouseout hover. In the cell next to it is an iframe which is the target of all the links in the menu. What I want is for one of the buttons to change to a third GIF image depending on the page that is loaded in to the frame. I don't want it to do that just because I clicked on it. I've found that this approach does not work when I click a link that goes to a bookmark within the page because the "active" link unhighlights. I dont want to use text links because there is not much "pizazz" on my page except for these buttons and the header. If some one could at the least point me into the right direction on how to write the code I'd be very happy. Thank you.