ul#navmenu-h { margin:0; padding:0 0 0 1px; list-style:none; position: relative; z-index:1000 }

ul#navmenu-h ul {
width:114px;
margin:0 0 0 -40px;
/*border-top:1px solid #FFFFFF;
border-right:1px solid #FFFFFF;*/
list-style:none;
display:none;
position:absolute;
top:100%;
left:0;
}

ul#navmenu-h ul ul,ul#navmenu-h ul ul ul { top: 0; left: 100%;}

ul#navmenu-h li { float: left; display: inline; position: relative; /*border-left:1px solid #FFFFFF;*/ }
ul#navmenu-h ul li { width: 100%; display: block; }

/* Root Menu */
ul#navmenu-h a {
display:block;
padding:8px 12px 0 0;
font:bold 14px/22px Georgia, "Times New Roman", Times, serif;
text-decoration:none;
color:#444444;
float:left;
height:1%;
}
/* Root Menu Hover Persistence */
ul#navmenu-h a:hover,ul#navmenu-h li:hover a,ul#navmenu-h li.iehover a {
color:#666666;
}

/* 2nd Menu */
ul#navmenu-h li:hover li a,ul#navmenu-h li.iehover li a {
font:normal 11px/14px Georgia, "Times New Roman", Times, serif;
border-bottom:1px solid #FFFFFF;
background:#DAF1F7;
text-align:left;
color:#444444;
height:20px;
float:none;
}

/* 2nd Menu Hover Persistence */
ul#navmenu-h li:hover li a:hover,ul#navmenu-h li:hover li:hover a,ul#navmenu-h li.iehover li a:hover,ul#navmenu-h li.iehover li.iehover a {
font:normal 11px/14px Georgia, "Times New Roman", Times, serif;
border-bottom:1px solid #FFFFFF;
background:#DAF1F7;
text-align:left;
color:#4DC0DD;
height:20px;
}

/* 3rd Menu */
ul#navmenu-h li:hover li:hover li a,ul#navmenu-h li.iehover li.iehover li a {
 background: #999;
}

/* 3rd Menu Hover Persistence */
ul#navmenu-h li:hover li:hover li a:hover,ul#navmenu-h li:hover li:hover li:hover a,ul#navmenu-h li.iehover li.iehover li a:hover,ul#navmenu-h li.iehover li.iehover li.iehover a {
 background: #666;
}

/* 4th Menu */
ul#navmenu-h li:hover li:hover li:hover li a,ul#navmenu-h li.iehover li.iehover li.iehover li a {
 background: #666;
}

/* 4th Menu Hover */
ul#navmenu-h li:hover li:hover li:hover li a:hover,ul#navmenu-h li.iehover li.iehover li.iehover li a:hover {
 background: #333;
}

/* Hover Function - Do Not Move */
ul#navmenu-h li:hover ul ul,ul#navmenu-h li:hover ul ul ul,ul#navmenu-h li.iehover ul ul,ul#navmenu-h li.iehover ul ul ul { display: none; }
ul#navmenu-h li:hover ul,ul#navmenu-h ul li:hover ul,ul#navmenu-h ul ul li:hover ul,ul#navmenu-h li.iehover ul,ul#navmenu-h ul li.iehover ul,ul#navmenu-h ul ul li.iehover ul { display: block; } 
View the JavaScript (for IE)

$(document).ready(function(){
  $("#navmenu-h li,#navmenu-v li").hover(
    function() { $(this).addClass("iehover"); },
    function() { $(this).removeClass("iehover"); }
  );
});