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<!--把下列代码放到<head>区域中-->
<SCRIPT language="JavaScript">
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function makevisible(cur,which){
if (which==0)
cur.filters.alpha.opacity=100
else
cur.filters.alpha.opacity=20
}
//-->
</SCRIPT>
<!--把下列代码放到<body>区域中-->
<img src="http://www.knowsky.com/images/logo.gif" style="filter:alpha(opacity=20)" onMouseOver="makevisible(this,0)" onMouseOut="makevisible(this,1)" width="120" height="90">
