<HTML>
<HEAD>
<TITLE> MEA </TITLE>
<link rel="stylesheet" type="text/css" href="test2.css" /> 
<style>
.suckerdiv ul{
margin: 0;
padding: 0;
list-style-type: none;
width: 160px; /* Width of Menu Items */
border-bottom: 1px solid #ccc;
}

.suckerdiv ul li{
position: relative;
}

/*Sub level menu items */
.suckerdiv ul li ul{
position: absolute;
width: 170px; /*sub menu width*/
top: 0;
visibility: hidden;
}

/* Sub level menu links style */
.suckerdiv ul li a{
display: block;
overflow: auto; /*force hasLayout in IE7 */
color: black;
text-decoration: none;
background: #fff;
padding: 1px 5px;
border: 1px solid #ccc;
border-bottom: 0;
}

.suckerdiv ul li a:visited{
color: black;
}

.suckerdiv ul li a:hover{
background-color: yellow;
}

.suckerdiv .subfolderstyle{
background: url(media/arrow-list.gif) no-repeat center right;
}


/* Holly Hack for IE \*/
* html .suckerdiv ul li { float: left; height: 1%; }
* html .suckerdiv ul li a { height: 1%; }
/* End */

</style>

<script type="text/javascript">


var menuids=["suckertree1"] //Enter id(s) of SuckerTree UL menus, separated by commas

function buildsubmenus(){
for (var i=0; i<menuids.length; i++){
  var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
    for (var t=0; t<ultags.length; t++){
    ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle"
        if (ultags[t].parentNode.parentNode.id==menuids[i]) //if this is a first level submenu
            ultags[t].style.left=ultags[t].parentNode.offsetWidth+"px" //dynamically position first level submenus to be width of main menu item
        else //else if this is a sub level submenu (ul)
          ultags[t].style.left=ultags[t-1].getElementsByTagName("a")[0].offsetWidth+"px" //position menu to the right of menu item that activated it
    ultags[t].parentNode.onmouseover=function(){
    this.getElementsByTagName("ul")[0].style.display="block"
    }
    ultags[t].parentNode.onmouseout=function(){
    this.getElementsByTagName("ul")[0].style.display="none"
    }
    }
        for (var t=ultags.length-1; t>-1; t--){ //loop through all sub menus again, and use "display:none" to hide menus (to prevent possible page scrollbars
        ultags[t].style.visibility="visible"
        ultags[t].style.display="none"
        }
  }
}

if (window.addEventListener)
window.addEventListener("load", buildsubmenus, false)
else if (window.attachEvent)
window.attachEvent("onload", buildsubmenus)

</script>
</HEAD>

<BODY>
<table width="98%" border="1">
<tr>

<td width="98%" colspan="3" >
<ul id="list-nav">
<li><a href="what.html">What's new</a></li>
<li><a href="mea(page from know india).html">MEA </a></li>
<li><a href="iccr.html">ICCR</a></li>
<li><a href="goi.html">GOI Directory</a></li>
<li><a href="reg.html">Registration</a></li>
<li><a href="hol.html">List of Holidays </a></li>
</ul></td>
</tr>

<tr>
<td>
<table>
<tr>
<td>
<div class="suckerdiv">
<ul id="suckertree1">
<li><a href="#">Embassy</a>
  <ul>
  <li><a href="#">Personnel</a></li>

  </ul>
</li>
<li><a href="#">India-Mexico Relations</a></li>
  <ul>
  <li><a href="#"></a>At glance</li>
  <li><a href="#">Bilateral relations</a>
  <li><a href="#">Programme</a>
    </li>
</ul>
</li>
<li><a href="#">Indai-Belize relations</a></li>
<li><a href="#">Commerce & Trade</a></li>
<ul>
  <li><a href="#">India</a></li>
  <ul>
    <li><a href="#">Doing Business</a></li>
    <li><a href="#">Visit</a></li>
    <li><a href="#">Study</a></li>
    </ul>
  <li><a href="#">Mexico</a></li>
<ul>
    <li><a href="#">Doing Business</a></li>
    <li><a href="#">Tourism</a></li>
    <li><a href="#">Visit</a></li>
    </ul>
</ul>
<li><a href="#">Culture Centre</a></li>
<ul>
  <li><a href="#">Know India</a></li>
  <li><a href="#">Know Mexico</a></li>
  <li><a href="#">Know Belize</a></li>
</ul>

<li><a href="#">Photo Gallery</a></li>
<li><a href="#">Publications</a></li>
<ul>
  <li><a href="#">Press release</a></li>
  <li><a href="#">Publications</a></li>
  <li><a href="#">India news</a></li>
  <li><a href="#">India perspective</a></li>
</ul>
<li><a href="#">Links</a></li>
<ul>
  <li><a href="#">Useful Govt links of India</a></li>
  <li><a href="#">Useful Govt links of Mexico</a></li>
  </ul>
</ul>
</div>
</td>
</tr>
</table>
</td>
<td>
<table>
<tr>
<td>
mid
</td>
</tr>
</table>
</td>
<td>
<table>
<tr>
<td>
right
</td>
</tr>
</table>
</td>
</tr>


</td>
</tr>
</table>

</BODY>
</HTML>

IE and FF see the parents differently

ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle"
alert("parent"+ultags[t].parentNode.tagName)
alert("parentparent"+ultags[t].parentNode.parentNode.id)
if (ultags[t].parentNode.parentNode.id==menuids[i]) //if this is a first level submenu

.

You might start by fixing the errors in the <ul>/<li> structures.

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