<!--把下列代码放到<head>区域中-->
<SCRIPT language="JavaScript">
<!--
function makevisible(cur,which){
if (which==0)
cur.filters.alpha.opacity=100
else
cur.filters.alpha.opacity=20
...
<!--把下列代码放到<head>区域中-->
<SCRIPT language="JavaScript">
<!--
function makevisible(cur,which){
if (which==0)
cur.filters.alpha.opacity=100
else
cur.filters.alpha.opacity=20
...