大家好，我有一个用层模拟的下拉菜单，可是出来的菜单却被下边的框架可遮挡了，该怎么办呢？

用 window.createPopup() 做你的层载体，例子可以参考 www.meizz.com

解决方案 »

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框架改用iframe，这就不是个问题了.
<HTML><HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JK:支持民族工业,尽量少买X货</title>
<SCRIPT language=javascript >function mouseOverFun(obj)
{
var toLi=event.toElement;
if(toLi==obj) return false;
if(toLi.tagName=="A" || toLi.tagName=="UL") toLi=toLi.parentElement;
if(toLi.children[1])
{
toLi.children[1].style.display="block";
//加上这句可以遮盖其它对象，如select：toLi.insertAdjacentHTML("beforeEnd","<iframe class='backgroundIframe'></iframe>");
}
}function onmouseOutFun(obj)
{
var fromLi=event.fromElement;
var eventToElement=event.toElement;
if(fromLi==obj) return false;
if(fromLi.tagName=="A" || fromLi.tagName=="UL") fromLi=fromLi.parentElement;
if(fromLi.contains(eventToElement)) return false;
if(fromLi.children[1])
{
fromLi.children[1].style.display="none";
//配合上面那句“可以遮盖其它对象，如select“：fromLi.children[2].removeNode(true);
}
var maxLevel=10;
while( maxLevel-- > 0)
{
fromLi=fromLi.parentElement.parentElement;
if(fromLi.contains(obj) || (fromLi.tagName!="LI" && fromLi.tagName!="TD") || fromLi.contains(eventToElement))
break;
fromLi.children[1].style.display="none";
//配合上面那句“可以遮盖其它对象，如select“：fromLi.children[2].removeNode(true);
}
}
</SCRIPT><STYLE type="text/css">* {
FONT: 11px verdana
}
UL {
PADDING: 0px; MARGIN: 0px; WIDTH: 150px; BORDER: #ccc 1px solid; DISPLAY:none; POSITION: absolute; LEFT: 149px; TOP: 0px;Z-INDEX:10;
}
LI {
BACKGROUND-COLOR:#ffffff;PADDING: 0px; MARGIN: 0px; WIDTH: 150px; BORDER: #ccc 1px solid; POSITION: relative;
}
TD LI UL {}
.menuA{
COLOR: #777;  TEXT-DECORATION: none; WIDTH:100%; HEIGHT:20px;
}
.menuAWidthSubmenu{
background-image: url('SubmenuExists.jpg'); background-repeat: no-repeat; background-position: right 50%;
}
.menuA:hover {
BACKGROUND-COLOR: #d9d9f9; COLOR: #e2144a;
}.menuLevel0{
PADDING: 0px; MARGIN: 0px;WIDTH: 100px; BORDER: #ccc 1px solid; POSITION: relative;
}
.menuLevel1{
LEFT: 0px;  TOP: 20px;
}.backgroundIframe{
position:absolute;
z-index:9;
width:expression(this.previousSibling.offsetWidth);
height:expression(this.previousSibling.offsetHeight);
left:expression(this.previousSibling.offsetLeft);
top:expression(this.previousSibling.offsetTop);}
</STYLE><META content="Microsoft FrontPage 4.0" name=GENERATOR></HEAD>
<BODY margin=0 padding=0 >
<table width=100% height=100% bgcolor=dddddd>
<tr>
<td>
部分代码来自gu1dai(异域苍穹......追夢人)：http://community.csdn.net/Expert/topic/4123/4123998.xml?temp=.4086878<br>
<table  onmouseover="mouseOverFun(this);" onmouseout="onmouseOutFun(this);" border=0 cellspacing=0  >
<tr>
<td class="menuLevel0">
<A class="menuA menuAWidthSubmenu" href="#">Munu1</A>
<UL class="menuLevel1">
  <LI>
    <A class="menuA menuAWidthSubmenu" href="#">Services</A>
    <UL>
      <LI><A class="menuA" href="#">Internet Marketing</A>
      <LI><A class="menuA" href="#">Hosting</A>
      <LI><A class="menuA" href="#">Domain Names</A>
      <LI><A class="menuA" href="#">Broadband</A>
    </UL>
  <LI>
    <A class="menuA menuAWidthSubmenu" href="#">Services</A>
    <UL>
      <LI><A class="menuA" href="#">Internet Marketing</A>
      <LI><A class="menuA" href="#">Hosting</A>
      <LI><A class="menuA" href="#">Domain Names</A>
      <LI><A class="menuA" href="#">Broadband</A>
    </UL></UL>
</td>
<td class="menuLevel0">
<A class="menuA menuAWidthSubmenu" href="#">Munu2</A>
<UL class="menuLevel1">
  <LI>
    <A class="menuA menuAWidthSubmenu" href="#">Services</A>
    <UL>
      <LI>
        <A class="menuA" href="#">Web Design</A>
        <UL>
          <LI><A class="menuA" href="#">Web Design->sub</A>
          <LI><A class="menuA" href="#">Web Design->sub2</A>
          <LI>
            <A class="menuA menuAWidthSubmenu" href="#">Web Design->sub3</A>
            <UL>
              <LI><A class="menuA" href="#">Web Design->3</A>
              <LI><A class="menuA" href="#">Web Design->3</A>
              <LI><A class="menuA" href="#">Web Design->3</A>
            </UL>
        </UL>
      <LI><A class="menuA" href="#">Internet Marketing</A>
      <LI><A class="menuA" href="#">Hosting</A>
      <LI><A class="menuA" href="#">Domain Names</A>
      <LI><A class="menuA" href="#">Broadband</A>
    </UL></UL>
</td>
<td> </td>
</tr>
</table>

</td>
</tr>
<tr height=100% ><td colspan=100>
<iframe src="about:blank" style="width:100%;height:100%;"></iframe>
</td></tr>
</table></BODY></HTML>