CSS for Dropdown Menu

#menu
{
background: #222; /* Show a solid color for older browsers */
background: -moz-linear-gradient(#252525, #0a0a0a);
background: -o-linear-gradient(#252525, #0a0a0a);
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#252525), to(#0a0a0a)); /* older webkit syntax */
background: -webkit-linear-gradient(#252525, #0a0a0a);
-webkit-box-shadow: rgba(0, 0, 0, 0.4) 0px 1px 2px;
-moz-box-shadow: rgba(0, 0, 0, 0.4) 0px 1px 2px;
box-shadow: rgba(0, 0, 0, 0.4) 0px 1px 2px;
clear: both;
display: block;
float: left;
margin: auto;
width: 100%;
}
#menu ul
{
font-size: 13px;
list-style: none;
margin: 0 0 0 30px;
padding-left: 0;
}
#menu li
{
float: left;
position: relative;
}
#menu a
{
color: #eee;
display: block;
line-height: 3.333em;
padding: 0 55px;
text-decoration: none;
}
#menu ul ul
{
-moz-box-shadow: 0 3px 3px rgba(0,0,0,0.2);
-webkit-box-shadow: 0 3px 3px rgba(0,0,0,0.2);
box-shadow: 0 3px 3px rgba(0,0,0,0.2);
display: none;
float: left;
margin: 0;
position: absolute;
top: 3.333em;
left: 0;
width: 188px;
z-index: 99999;
}
#menu ul ul ul
{
left: 100%;
top: 0;
}
#menu ul ul a
{
background: #f9f9f9;
border-bottom: 1px dotted #ddd;
color: #444;
font-size: 13px;
font-weight: normal;
height: auto;
line-height: 1.4em;
padding: 10px 10px;
width: 168px;}
#menu li:hover > a{background: #efefef;}
#menu ul ul :hover > a {background: #efefef;}
#menu a:focus {background: #efefef;}
#menu li:hover > a,#menu a:focus
{
background: #f9f9f9; /* Show a solid color for older browsers */
background: -moz-linear-gradient(#f9f9f9, #e5e5e5);
background: -o-linear-gradient(#f9f9f9, #e5e5e5);
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#f9f9f9), to(#e5e5e5)); /* Older webkit syntax */
background: -webkit-linear-gradient(#f9f9f9, #e5e5e5);color: #373737;
}
#menu ul li:hover > ul {display: block;}
#menu .current-menu-item > a,#menu .current-menu-ancestor > a,#menu .current_page_item > a,#menu .current_page_ancestor > a, #menu .active > a
{
background: #f9f9f9; /* Show a solid color for older browsers */
background: -moz-linear-gradient(#f9f9f9, #e5e5e5);
background: -o-linear-gradient(#f9f9f9, #e5e5e5);
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#f9f9f9), to(#e5e5e5)); /* Older webkit syntax */
background: -webkit-linear-gradient(#f9f9f9, #e5e5e5);
color: #373737;
}