CSS Drop down menu

@charset "UTF-8";

#naviWrap
{
background-color:#000;
background-color:rgba(0,0,0,0.5);
margin:15px 0 0 0;
}
#topNavigation
{
border-left:1px solid rgba(255,255,255,0.25);
margin:0 auto;
width:960px;
}
#topNavigation ul
{
margin: 0;
padding: 0;
list-style: none;

}
#topNavigation li
{
position: relative;
border-left:1px solid rgba(0,0,0,0.25);
border-right:1px solid rgba(255,255,225,0.25);
display:inline-block;
height:60px;
line-height:60px;
text-align:center;
}
#topNavigation li a /*tekst in list items uit het hoofdmenu */
{
color:#fff;
display:block;
font-size:11px;
height:60px;
padding:0 30px;
text-decoration:none;
text-transform:uppercase;
font-style: italic;
font-weight:bold;
}
#topNavigation li a:hover  /*De list item tekst waar er over gehovered wordt*/
{
background-color:#000;
background-color:rgba(0,0,0,0.2);

text-decoration:underline;
}

#topNavigation li.current
{
background-color:#000;
background-color:rgba(0,0,0,0.5);
}
#topNavigation li:hover ul li
{
display: block;

}

#topNavigation li ul li:hover
{

background-color:rgba(0,0,0,0.8);
display:block;
}

#topNavigation li li /*de list items uit de sub menus*/
{
border-style: none;
position: absolute;
display: none;
float: auto;
background-color:rgba(0,0,0,0.8);

}

#topNavigation li ul
{
    position: absolute;
    left: 0px;
    top: 60px;
    display: inline-block;
}
#topNavigation ul li
{

 position: relative;

 }
 #topNavigation ul ul {
 visibility: hidden;
 position: absolute;
 top: 100%;
 left: 0;
 z-index: 598;
 width: 100%;
}
#topNavigation li ul:hover li
{
display:block;
}