HTML:
<map name="Map" id="Map">
<area shape="rect" coords="32,36,222,109" href="#" alt="hi" />
<area shape="rect" coords="246,45,420,110" href="#" alt="alt" />
<area shape="rect" coords="456,45,585,111" href="#" />
<area shape="rect" coords="627,44,768,118" href="#" />
</map>
JQuery:
<script type="text/javascript">
$(function(){
$('map area').click(function(){
alert($(this).attr('alt'));
});
});
</script>