Are you talking about using an image map? eg
<map id="mymap" name="mymap">
<area shape="rect" coords="0,0,82,126">
<area shape="rect" coords="90,90,,58,3">
<area shape="rect" coords="124,124,,58,8">
</map>
If so... they can have a href attribute. Just pass an id via the url. eg;
<map id="mymap" name="mymap">
<area shape="rect" coords="0,0,82,126" href="index.php?id=1">
<area shape="rect" coords="90,90,,58,3" href="index.php?id=2">
<area shape="rect" coords="124,124,,58,8" href="index.php?id=3">
</map>