/* CSS Document */

.co_center{ background:#fff; position:relative; z-index:7; height:200px; width:200px; overflow:hidden;  }

.nav_sub{  top:-90px; left:695px; }
.co_center{ left:300px;  top:-75px;}
.nav{top:5px;}
.co_center a{ display:block; float:left; height:100px; width:100px;}
.co_center a:hover{opacity:0.50;
 filter: alpha(opacity=50) ;
}