<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
<% ab="bt"%>
<script type="text/javascript">
function gh(){
document.getelementbyid("ff"
.style.display="block";}
</script>
<script language="javascript" type="text/javascript">
<!--
function MM_reloadPage(init) { //reloads the window if Nav4 resized
if (init==true) with (navigator) {if ((appName=="Netscape"
&&(parseInt(appVersion)==4)) {
document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);
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>
</head>
<body>
<div id="ff" style="position:absolute; left:235px; top:116px; width:365px; height:251px; z-index:1; visibility: hidden;"><img src="image/'<%=ab%>'.jpg" width="300" height="225"></div>
<a href="javascript:;" onMouseOver="<%ab=bt%>;MM_showHideLayers('ff','','show')" onMouseOut="MM_showHideLayers('ff','','hide')"><img src="image/aq.jpg" width="191" height="25" border="0"></a>
</body>
</html>
上面的代码是行者大侠的，我将层的内容改成变变量为什么不行，我错在哪里请大侠帮我
