#nav {padding:0; margin:0; list-style:none; height:26px; z-index:500; font-family:arial, verdana, sans-serif;}
#nav li.top {display:block; float:left; height:26px;}
#nav li a.top_link {display:block; float:left; height:26px; line-height:26px; color:white ; text-decoration:none; font-size:11px; font-weight:bold; padding:0px; cursor:pointer;}
#nav li a.top_link span {float:left; display:block; padding:0px; height:26px;}
#nav li a.top_link span.down {float:left; display:block; padding:0px; height:26px;}
<!--  -->
#nav li:hover a.top_link {color:#FF0000}
#nav li:hover a.top_link span {background:#FFFFFF;}
#nav li:hover a.top_link span.down {color:#0066CC}

/* Default list styling */

#nav li:hover {position:relative; z-index:500;}

#nav li:hover ul.sub
{left:0px; top:20px; background: #FFFFFF; padding:0px; border:1px solid blue; white-space:nowrap; width:170px; height:auto; z-index:300; text-align:left}
#nav li:hover ul.sub li
{display:block; height:26px; position:relative; float:left; width:170px; font-weight:normal; text-align:left}
#nav li:hover ul.sub li a
{display:block; font-size:11px; height:26px; width:170px; line-height:26px; text-indent:5px; color:#0066CC; text-decoration:none; text-align:left}
#nav li ul.sub li a.fly
{background:#FFFFFF no-repeat;}
#nav li:hover ul.sub li a:hover 
{background:#0066CC; color:#FFFFFF; }
#nav li:hover ul.sub li a.fly:hover
{background:#0066CC no-repeat; color:#FFFFFF;}


#nav li:hover li:hover li:hover li:hover li:hover ul
{left:100px; top:0px;  padding:0px; white-space:nowrap; width:100px; z-index:400; height:auto;}


#nav li:hover li:hover li:hover li:hover ul
{left:100px; top:0px;  padding:0px; white-space:nowrap; width:100px; z-index:400; height:auto;}


#nav li:hover li:hover li:hover ul
{left:100px; top:0px;  padding:0px; white-space:nowrap; width:100px; z-index:400; height:auto;}


#nav li:hover li:hover ul
{left:100px; top:0px;  padding:0px; white-space:nowrap; width:100px; z-index:400; height:auto;}

#nav li:hover li:hover li:hover li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover li:hover li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover li:hover li:hover li:hover li:hover a.fly
{ color:#0066CC; border-color:#FF0000;} 

#nav li:hover li:hover li:hover li:hover a.fly
{ color:#0066CC; border-color:#FF0000;} 

#nav li:hover li:hover li:hover a.fly
{ color:#0066CC; border-color:#FF0000;} 

#nav li:hover li:hover a.fly
{ color:#0066CC; border-color:#FF0000;} 

#nav li:hover li:hover li:hover li:hover li a.fly
{background:#FFFFFF ; color:#FF0000; border-color:#FFFFFF;} 

#nav li:hover li:hover li:hover li a.fly
{background:#FFFFFF ; color:#FF0000; border-color:#FFFFFF;} 

#nav li:hover li:hover li a.fly
{background:#FFFFFF ; color:#FF0000; border-color:#FFFFFF;}