.tab_ul {
width: 100%;
padding: 0;
margin: 0;
height: 51px;
list-style: none;
}

.tab_ul li {
width: 236px;
margin: 0 1px 0 0;
float: left;
height: 100%;
font-size: 13px;
line-height: 50px;
}

ul, menu, dir {
display: block;
list-style-type: disc;
-webkit-margin-before: 1em;
-webkit-margin-after: 1em;
-webkit-margin-start: 0px;
-webkit-margin-end: 0px;
-webkit-padding-start: 40px;
}
.tab_ul li a:hover, .tab_ul li.active a {
background: url("../images/navigation/btm_tab_h.gif") repeat-x 0 0;
}

.tab_ul li a {
height: 51px;
display: block;
float: left;
width: 100%;
text-align: center;
color: #fff;
background: #26559b;
}
.tab_ul li a span b {
display: inline-block;
zoom: 1;
background: url("../images/navigation/about_ustabicon.png") no-repeat 0 9px;
padding: 0 0 0 53px;
font-weight: normal;
}
.tab_ul li.bill b {
background: url("../images/navigation/bill_ustabicon.png") no-repeat 0 15px;
padding: 0 0 0 48px;
}
.tab_ul li.cunsumr b {
background: url("../images/navigation/cunsmr_ustabicon.png") no-repeat 0 10px;
padding: 0 0 0 36px;
}
.tab_ul li.vender b {
background: url("../images/navigation/venderl_ustabicon.png") no-repeat 0 10px;
padding: 0 0 0 36px;
}