Hallo Sebastian,
so ruf ich es auf:
<map name="thumb01">
<area shape=rect coords="1,1,74,84" href="javascript:metgallery('pic/ajfa.jpg',460,460)">
<area shape=rect coords="75,1,149,84" href="javascript:metgallery('pic/met3.jpg',400,391)">
</map>
bb = BildBreite
bh = Bildhöhe
mfg
hans