Horizontal Submenu with Horizontal Menu using CSS Friendly Menu Control Adapter in C#

/* This style sheet is intended to contain RARELY CHANGED rules used when the Menu control adapter is enabled. */
/* These rules correspond to the "pure CSS menu" technique that have been evolving over the past several years. */ 
/* See WhitePaper.aspx for details. */
#navtop{background-color:#f9f9f9; width:100%; height:32px;}
ul.AspNet-Menu 
{
   
}


ul.AspNet-Menu, 
ul.AspNet-Menu ul
{
    margin: 0;
    padding: 0;
    display: block;

}

ul.AspNet-Menu li
{
    list-style: none;
}

ul.AspNet-Menu li a,
ul.AspNet-Menu li span
{
    display: block;
    text-decoration: none;
}

ul.AspNet-Menu ul
{
   display: none;    
}

/* Add more rules here if your menus have more than three (3) tiers */
ul.AspNet-Menu li:hover ul ul,
ul.AspNet-Menu li:hover ul ul ul,
ul.AspNet-Menu li.AspNet-Menu-Hover ul ul,
ul.AspNet-Menu li.AspNet-Menu-Hover ul ul ul
{
    display: none;
}

/* Add more rules here if your menus have more than three (3) tiers */
ul.AspNet-Menu li:hover ul,
ul.AspNet-Menu li li:hover ul,
ul.AspNet-Menu li li li:hover ul,
ul.AspNet-Menu li.AspNet-Menu-Hover ul,
ul.AspNet-Menu li li.AspNet-Menu-Hover ul,
ul.AspNet-Menu li li li.AspNet-Menu-Hover ul
{
    display: block;
}

/* -------------------------------------------------------------------------- */
/* When the Menu control's Orientation property is Horizontal the adapter wraps the menu with DIV */
/* whose class is AspNet-Menu-Horizontal. This allows us to force the top tier of the menu to layout */
/* horizontally, whereas all subsequent tiers of the menu lay out vertically. */

.AspNet-Menu-Horizontal ul.AspNet-Menu li
{
    float: left;
}

.AspNet-Menu-Horizontal ul.AspNet-Menu li li
{
    float: left;
}