.preload1 {background: url(images/pro_drop4_2a.gif);}
.preload2 {background: url(images/pro_drop4_2b.gif);}

.vdd {padding:0; margin:0; list-style:none; height:36px; background:transparent url(images/pro_drop4_back.gif); position:relative; z-index:500; font-family:verdana, arial sans-serif;}
.vdd li.top {display:block; float:left;}
.vdd li a.top_link {display:block; float:left; height:36px; line-height:27px; color:#456; text-decoration:none; font-size:12px; font-weight:bold; padding:0 0 0 10px; cursor:pointer;background: url(images/pro_drop4_0a.gif) no-repeat;}
.vdd li a.top_link span {float:left; display:block; padding:0 20px 0 10px; height:36px;background:url(images/pro_drop4_0b.gif) right top;}
.vdd li a.top_link:hover {color:#000; background: url(images/pro_drop4_2a.gif) no-repeat; line-height:25px;}
.vdd li a.top_link:hover span {background:url(images/pro_drop4_2b.gif) no-repeat right top;}
.vdd li:hover > a.top_link {color:#000; background: url(images/pro_drop4_2a.gif) no-repeat; line-height:25px;}
.vdd li:hover > a.top_link span {background:url(images/pro_drop4_2b.gif) no-repeat right top;}
.vdd table {border-collapse:collapse; width:0; height:0; position:absolute; top:0; left:0;}
.vdd a:hover {visibility:visible; position:relative; z-index:200;}
.vdd li:hover {position:relative; z-index:200;}
.vdd ul {position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}
.vdd ul.sub1 {width:130px;}
.vdd ul.sub2 {width:110px;}
.vdd ul.sub3 {width:90px;}
.vdd ul.sub4 {width:112px;}
.vdd :hover ul {left:0; top:35px; background-color: #e1f1ff; padding:3px; border:1px solid #ABC; border-width:0 1px 1px; white-space:nowrap; height:auto; z-index:300;}
.vdd :hover ul li {display:block; height:20px; position:relative; font-weight:normal; width:auto;}
.vdd :hover ul li a {display:block; font-size:11px; height:20px; line-height:20px; width:auto; padding:0 10px; color:#000; text-decoration:none;}
.vdd :hover ul li a:hover {background-color:#1c99ff; color:#fff;}