I am not sure whether i am missing something here, but it seems i cannot put an imagemap above everything else (in terms of z-index). I tried varying the order of the HTML element definition, i tried using CSS to define proper z-index values, but none of these approaches works.
Has anyone encountered similar issues?
(Tested in FF 8.0.1)
You need to add position:absolute; to the map too:
http://jsfiddle.net/sBSHn/1/