在<head>标签加入：
<script type="text/JavaScript">
<!--
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_showHideLayers() { //v6.0
var i,p,v,obj,args=MM_showHideLayers.arguments;
for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
obj.visibility=v; }
}
//-->
</script>
FLASH控制隐藏层：
getURL("javascript:MM_showHideLayers('Layer1','','hide')");
FLAHS控制显示层：
getURL("javascript:MM_showHideLayers('Layer1','','show')");
如果层是放在FLASH上，记得在FLASH页面属性中加上透明：
<param name="wmode" value="transparent">
<embed ... wmode="transparent"></embed>
源文件：
http://www.68design.net/art/images/flash/20061122001.rar
