pour l'affichage d'une image il faut rajouter des lignes à ton code d'image map.
<style type="text/css">
.pop2 { POSITION: absolute; VISIBILITY: hidden }
</style>
<DIV class=pop2 id=img></DIV>
<SCRIPT type="text/javascript">
if (document.getElementById){
box = document.getElementById("img").style;
if(navigator.appName.substring(0,3) == "Net")
document.captureEvents(Event.MOUSEMOVE);
document.onmousemove = pointer;
}
function poplink(contenu){
var content ="<TABLE border=1 CELLPADDING=1 CELLSPACING=1><TR><TD BGCOLOR=#ffffff><CENTER>"+contenu+"</CENTER></TD></TR></TABLE>";
if (document.getElementById)
{
document.getElementById("img").innerHTML =
content;
box.visibility = "visible";
}
}
function pointer(e)
{
var x = (navigator.appName.substring(0,3) == "Net") ? e.pageX : event.x+document.body.scrollLeft;
var y = (navigator.appName.substring(0,3) == "Net") ? e.pageY : event.y+document.body.scrollTop;
box.left = x+10;
box.top = y-10;
}
function closepopup()
{
if (document.getElementById)
box.visibility = "hidden";
}
</SCRIPT>
<img src="ton image mappable" width="640" height="318" border="0" usemap="#map" />
<map name="map">
<!-- #$-:Image map file created by GIMP Image Map plug-in -->
<!-- #$-:GIMP Image Map plug-in by Maurits Rijk -->
<!-- #$-:Please do not edit lines starting with "#$" -->
<!-- #$VERSION:2.3 -->
<!-- #$AUTHOR:dany -->
<area shape="rect" coords="238,113,287,172" title="le nom de la zone" HREF="" onMouseOver="poplink('<img src=ici ton image>')"; onmouseout="closepopup()"" />
box.left = x+ ou - le décalage de la miniature à l'horizontale
box.top = y+ ou - le décalage vertical