。用层就好了。
<html>
<head>
<style type="text/css">
<!--
#Layer2 {
position:absolute;
left:42px;
top:110px;
width:305px;
height:116px;
z-index:1;
visibility:hidden;
}
-->
</style>
<script language="javascript" 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>
</head>
<body>
<div id="Layer2"><input type='file' /></div>
<input type="button" value="显示" onClick="MM_showHideLayers('Layer2','','show')"/>
<input type="button" value="隐藏" onClick="MM_showHideLayers('Layer2','','hide')"/>
</body>
</html>2008-03-26
