共两步： 1.在<head></head>中加入 <script language="JavaScript1.2"> function makevisible(cur,which){ if (which==0) cur.filters.alpha.opacity=100 else cur.filters.alpha.opacity=20 } </script> 2.在<body></body>中加入 <a href="http://7stk.com"><img src="images/1.jpg" border=0 style="filter:alpha(opacity=20)" onMouseover="makevisible(this,0)" onMouseout="makevisible(this,1)"></a>
