body {background-color: black;}

.TopBar { 
position: fixed; 
top: 0px;
width: 100%;
background-color: red; 
height: 40px;
left: 0px;
} 

.TopBar:hover {
background-color: white;
}

#logo {
    position: absolute;
    top: 50%;
    width: auto;
    height: auto;
    left: 50%;
    margin-left: -327px;
    margin-top: -90px;
	
}​