ul#nav li a.about {
background: url(image/about_b.jpg) no-repeat bottom;
width: 117px;
}
ul#nav li a.about:hover, ul#nav li a.about:active {
background-position: top;
width: 117px;
}
ul#nav li a.about item {
width:117px; height:40px;
filter: alpha(opacity=60);
opacity:0.6;
background: #000000;
display: none;
z-index:500;
}
ul#nav li a.about:hover item, ul#nav li a.aboutsub:active item {
display:block;
height:20px;
position:relative;
top:44px;
}