I am wanting to add a menu look and operation similar to this blog post. I am not using HTML5 and I am not using CSS3. Also, I am a CSS n00b and don't really grasp what each tag does (or can do) so I feel like I am drowning here in understanding what to do. I have been scouring the net looking for an example of what I want to do and have had no luck beyond the link above.
This is the "standard" ASP.NET MVC 2 template. We actually like the look for our internal applications. But the menu is something that needs help yet.
Here is what I have working so far:

HTML:
<div id="menucontainer">
<ul id="menu">
<li><%= Html.ActionLink("Home", "Index", "Home")%></li>
<li><%= Html.ActionLink("Sign Timesheet", "Index", "Timesheet") %></li>
<li>
<%= Html.ActionLink("Leave Requests", "Index", "LeaveRequest") %>
<ul>
<li><%= Html.ActionLink("New Leave Request", "Create", "LeaveRequest")%></li>
<li><%= Html.ActionLink("Leave Request History", "History", "LeaveRequest") %></li>
</ul>
</li>
<%--<li><%= Html.ActionLink("About", "About", "Home")%></li>--%>
<li><a href="#" target="_blank">NaviLine</a></li>
<li><%= Html.ActionLink("Help", "Help", "Home") %></li>
</ul>
</div>
CSS:
/* TAB MENU
----------------------------------------------------------*/
ul#menu
{
border-bottom: 1px #5C87B2 solid;
padding: 0 0 2px;
position: relative;
margin: 0;
text-align: right;
}
ul#menu li
{
display: inline;
list-style: none;
}
ul#menu li#greeting
{
padding: 10px 20px;
font-weight: bold;
text-decoration: none;
line-height: 2.8em;
color: #fff;
}
ul#menu li a
{
padding: 10px 20px;
font-weight: bold;
text-decoration: none;
line-height: 2.8em;
background-color: #e8eef4;
color: #034af3;
}
ul#menu li a:hover
{
background-color: #fff;
text-decoration: none;
}
ul#menu li:hover ul
{
display: block;
}
ul#menu li a:active
{
background-color: #a6e2a6;
text-decoration: none;
}
ul#menu li.selected a
{
background-color: #fff;
color: #000;
}
ul#menu li ul
{
position: absolute;
right: 0px;
top:34px;
display: none;
}