ul.dropdown,
ul.dropdown li,
ul.dropdown ul {
 list-style: none;
 margin: 0;
 padding: 0;
}
ul.dropdown {
 position: relative;
 z-index: 597;
 float: left; 
}

ul.dropdown li {
 float: left;
 line-height: 2.1em;
 vertical-align: middle;
 zoom: 1;
 height:27px;
 padding-left:4px;
 padding-right:4px;
}
ul.dropdown li.hover,
ul.dropdown li:hover {
 position: relative;
 z-index: 599;
 cursor: default;
}

ul.dropdown ul {
 visibility: hidden;
 position: absolute;
 top: 100%;
 left: 0;
 z-index: 598;
 width: 100%;
}

ul.dropdown ul li {
 float: none;
 padding-left:5px;
 padding-right:5px;
 width:170px;
}

ul.dropdown ul ul {
 top: 1px;
 left: 99%;
}

ul.dropdown li:hover > ul {
 visibility: visible;
}