<script language="JavaScript1.2"> function makevisible(cur,which){ if (which==0) cur.filters.alpha.opacity=100 else cur.filters.alpha.opacity=20 } </script>
◇步骤二:将这段代码复制到到<body></body>之间您需要的位置
<img src="想要显示的图片.gif" style="filter:alpha(opacity=20)" onMouseOver="makevisible(this,0)" onMouseOut="makevisible(this,1)">