Third Level Drop Down Menu is not Hidden

[xuexue]

This is the code for my third level drop down menu.

<ul id="menu">
                <li><a href="ourlovestory.php">Our Love Story</a></li>
                <li><a>Notes</a>
                    <ul>
                        <li><a href="blog.php">Blog</a></li>
                        <li><a href="guestbook.php">Guestbook</a></li>
                            <ul>
                                <li><a href="guestbooksign.php">Sign our Guestbook</a></li>
                            </ul>
                    </ul>
                </li>            
            </ul>

What i want is the third level, Sign our Guestbook, be hidden then be displayed once hovered to Guestbook link.
But my problem is that it is already displayed on the second level.

This is my CSS for this one.

ul 
{
    font-family: 'tr_freehand591regular';
    font-size: 18px;
    margin: 0px;
    padding: 0px;
    list-style: none;   
    z-index:100;
}

ul li
{
    display: block;
    position: relative;
    float: left;
}

li ul
{
    display: none;
}

#menu a 
{
    color: #ff1493;
}

#menu a:hover
{
    color: #98fb98;
}

ul li a
{
    display: block;
    text-decoration: none;
    padding: 5px 15px 5px 15px;
    background: #fff0f5;
    margin-left: 1px;
    white-space: nowrap;
}

ul li a:hover 
{
    background: #3b3b3b;
}

li:hover ul 
{
    display: block;
    position: absolute; 
    visibility: visible;
}

li:hover li 
{
    float: none;
    font-size: 16px;
}

li:hover a 
{ 
    background: #3b3b3b; 
}

[xuexue]

Hi! I've already hide it :) Yey!

This is what i added.

li ul, li ul ul li //li ul ul li
{
    display: none;
}

The second problem is how can i display it when hovered?

[xuexue]

This is done already! Got it!

Displaying when hovered.

Now, i want that displayed link be adjacent to the parent link and not at the bottom.

how could i do taht?

[xuexue]

got it already, u just have to

li:hover ul li:hover ul li
{
    display: block;
    position: relative; 
    margin: -33px 0px 0px 90px;
}