ciao ragazzi è possibile applicare l'effetto fade su un'area?

io ho il seguente codice:

codice:
  
<script language="JavaScript1.2">

function high(which2){
theobject=which2
highlighting=setInterval("highlightit(theobject)",50)
}
function low(which2){
clearInterval(highlighting)
if (which2.style.MozOpacity)
which2.style.MozOpacity=0.3
else if (which2.filters)
which2.filters.alpha.opacity=30
}

function highlightit(cur2){
if (cur2.style.MozOpacity<1)
cur2.style.MozOpacity=parseFloat(cur2.style.MozOpacity)+0.1
else if (cur2.filters&&cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=10
else if (window.highlighting)
clearInterval(highlighting)
}

</script>

applicato a


codice:
  
<map name="FPMap0">
    <area target="_self" href="postadelcuore/index.htm" shape="rect" coords="69, 331, 149, 360" style="filter:alpha(opacity=30);-moz-opacity:0.3" onMouseover="high(this);" onMouseout="low(this);">
    <area target="_self" href="golosita/index.htm" shape="rect" coords="95, 239, 173, 255">
    <area target="_self" href="artist/index.htm" shape="rect" coords="59, 30, 114, 45">
    <area target="_self" href="special/index.htm" shape="rect" coords="238, 238, 300, 253">
    <area target="_self" href="interviste/index.htm" shape="rect" coords="394, 409, 482, 427">
    <area target="_self" href="lostintime/index.htm" shape="rect" coords="436, 162, 532, 178">
    </map>
forse sbaglio l'utilizzo del codice ma nn avviene nulla!

x avere un'idea l'effetto deve essere applicato alla mappa presente a qs link http://www.shakeshake.altervista.org.

grazie!