CSS Menu link stays highlighted

Question

So I'm trying my hands at a css menu and I have a simple bug that I cannot fix and haven't found any help searching for it. The issue is that when I hover over a drop down menu the parent link stays highlighted and the text reverts back to the original color. Hopefully that explains it. Here's the css code, I'm sure it's a matter of adding something or fixing a line of code. You can check out the issue here, everything works fine until you visit a submenu (like in BAR or Info).

#nav, #nav ul {
    text-align: center;
    text-size:16px;
    float: left;
    width: 750px;
    height: 20px;
    list-style: none;
    line-height: 1;
    background: white;
    padding: 0;
    border: solid #000;
    border-width: 0px;
    border-bottom-width: 1px;
    margin: 0;
    background-image: url('/images/bg.gif');
}

#nav a {
    display: block;
    width: 75px;
    height: 20px;
    color: #0000FF;
    text-decoration: none;
}

#nav a:hover {
    display: block;
    width: 75px;
    height: 20px;
    color: #FFF;
}

#nav li {
    float: left;
    padding: 0;
    width: 75px;
}

#nav li ul { /*sub menu */
    position: absolute;
    left: -999em;
    height: auto;
    width: 75px;
    border: solid #000;
    border-width: 0px;
    border-bottom-width: 1px;
    border-top-width: 1px;
    background-image: url('/images/submenu_bg.png');
}

#nav li li {
    width: 75px;
}

#nav li ul a {
    width: 75px;
}

#nav li ul ul {
    margin: -1.75em 0 0 14em;
}

#nav li:hover ul ul, #nav li:hover ul ul ul, #nav li.sfhover ul ul, #nav li.sfhover ul ul ul {
    left: -999em;
}

#nav li:hover ul, #nav li li:hover ul, #nav li li li:hover ul, #nav li.sfhover ul, #nav li li.sfhover ul, #nav li li li.sfhover ul {
    left: auto;
}

#nav li:hover, #nav li.sfhover {
    height: 20px;
    background: #0000FF;
}

Answer 1

You can try setting the color of the link on the hover of the li, like so:

#nav li:hover a {
    color: #fff;
}

#nav li:hover li a
{
    color: #0000FF;
}

Answer 2

You're setting the text color on #nav a:hover, but the background color on #nav li:hover. Because your submenus are contained within the li, it still counts as being hovered over even while the cursor is in the submenu. The submenus aren't contained within the link, so they don't stay highlighted and revert to their normal color. If you want the menu item to stop highlighting, move the background property to #nav a:hover instead.

Before:

#nav a:hover {
    display: block;
    width: 75px;
    height: 20px;
    color: #FFF;
}

#nav li:hover, #nav li.sfhover {
    height: 20px;
    background: #0000FF;
}

After:

#nav a:hover, #nav li.sfhover a {
    display: block;
    width: 75px;
    height: 20px;
    color: #FFF;
    background: #0000FF;
}

Alternatively, if you want the menu to stay highlighted while hovering on the submenu (which looks better, IMO), move color to the li:hover. I know it's a little verbose, but it works. :-)

Before:

#nav a:hover {
    display: block;
    width: 75px;
    height: 20px;
    color: #FFF;
}

#nav li:hover, #nav li.sfhover {
    height: 20px;
    background: #0000FF;
}

After:

#nav a:hover {
    display: block;
    width: 75px;
    height: 20px;
}

#nav li:hover a, #nav li.sfhover a {
    color:white;
}

#nav li:hover li a, #nav li.sfhover li a {
    color:blue;
}

#nav li:hover li a:hover, #nav li.sfhover li a:hover {
    color:white;
}

#nav li:hover, #nav li.sfhover {
    color: #FFF;
    height: 20px;
    background: #0000FF;
}