ul.topnav {  
    list-style: none;  
    padding: 0px;  
    margin: 0;  
    float: left;  
    width: 100%;  
     font-size: 11px;
}  
ul.topnav li {  
    float: left;  
    margin: 0;  
    padding: 0 5px;
    position: relative; 
    z-index:10;
}  
ul.submenu li {
    z-index:2;
}
ul.topnav li a{  
    padding: 10px 5px;  
    color: #fff;  
    display: block;  
    text-decoration: none;  
    float: left;  
}  
ul.topnav li span {
    width: 17px;  
    height: 20px;  
    float: left;  
    background: url(menu17/subnav_btn.gif) no-repeat center top;  
}  
ul.topnav li span.subhover {background-position: center bottombottom; cursor: pointer;} 
ul.topnav li ul.subnav {  
    list-style: none;  
    position: absolute;
    left: 0; top: 32px;  
    background: #333;  
    margin: 0; padding: 0;  
    display: none;  
    float: left;  
    width: 170px;  
    border: 1px solid #111;  
-moz-border-radius-bottomleft: 7px;
-moz-border-radius-bottomright: 7px;
-webkit-border-radius-bottomleft: 7px;
-webkit-border-radius-bottomright: 7px;
}  
ul.topnav li ul.subnav li{  
    margin: 0; padding: 0;  
    border-top: 1px solid #252525;
    border-bottom: 1px solid #444; 
    clear: both;  
    width: 170px;  
}  
html ul.topnav li ul.subnav li a {  
    float: left;  
    width: 145px;  
    background: #333 url(menu17/dropdown_linkbg.gif) no-repeat 10px center;  
    padding-left: 20px;  
}  
html ul.topnav li ul.subnav li a:hover {
    background: #222 url(menu17/dropdown_linkbg.gif) no-repeat 10px center;  
}