.menu_item {
background: #000 url(../images/romb.png) right center no-repeat;
height:28px; 
width:106px; 
font: normal 14px Tahoma; 
line-height: 28px;
padding: 0 0 0 8px;
display: block;
text-decoration: none;
color: white;
margin-top:9px;
}

.submenu_item {
width: 150px;
height: 28px;
background: #0c0c0c;
font-size: 11px;
font-family:Verdana, Tahoma;
padding: 0 8px;
display: block;
line-height: 28px;
text-decoration: none;
color: white;
z-index: 999;
}

.submenu_item:hover {
background: #707070;
}

.submenu {
position:absolute;
left: 0px;
top: 37px;
display: none;
z-index: 999;
}