.billboard{ position:relative; left:50%; margin-left:-457px; width:916px; height:422px; background:transparent url(../img/billboard_02.png) no-repeat 0px 0px; }
.container{ position:absolute; left:50%; margin-left:-447px; width:916px; height:422px; }
.ad{ width:800px; height:336px; position:relative; margin:25px 0px 0px 50px; background-color:#333; }
.ad_1 img{ width:35px; height:336px; position:absolute; }
.ad_2 img{ width:0px; height:336px; margin-left:18px; position:absolute; }
.ad_3 img{ width:0px; height:336px; margin-left:18px; position:absolute; }
.ad_4 img{ width:0px; height:336px; margin-left:18px; position:absolute; }
.slice_1{left:0px;}
.slice_2{left:36px;}
.slice_3{left:72px;}
.slice_4{left:108px;}
.slice_5{left:144px;}
.slice_6{left:180px;}
.slice_7{left:216px;}
.slice_8{left:252px;}
.slice_9{left:288px;}
.slice_10{left:324px;}
.slice_11{left:360px;}
.slice_12{left:396px;}
.slice_13{left:432px;}
.slice_14{left:468px;}
.slice_15{left:504px;}
.slice_16{left:540px;}
.slice_17{left:576px;}
.slice_18{left:612px;}
.slice_19{left:648px;}
.slice_20{left:684px;}
.slice_21{left:720px;}
.slice_22{left:756px;}