I have problem with my navbar sub-menu. I have this css code centering everything on navbar without displaying my sub-menu. I'm a newbie though but I can make change if someone can help. Many thanks
Here is the code I have:

#navigation
{
float: left;
width: 1000px;
background: #333;
}

#navigation ul
{
margin: 0;
padding: 0;
}

#navigation ul li
{
list-style-type: none;
display: inline;
}

#navigation li a
{
display: block;
float: left;
padding: 5px 10px;
color: #fff;
text-decoration: none;
border-right: 1px solid #fff;
}

#navigation li a:hover { background: #383; }

I will be glad if someone can help to completed the code so that my sub-menu can work together with the main menu. Urgent help needed please.

MAy you show your HTML ul code with this please