#botonera{
        margin:15px auto 0px -30px;
}
#nav {
        margin:0px auto 0px auto;
        list-style:none;
        height:35px;
        font-family:"Lucida Sans Unicode", "Bitstream Vera Sans", "Trebuchet Unicode MS", "Lucida Grande", Verdana, Helvetica, sans-serif;
        width: 1140px;
        display: block;
        position: relative;
        padding: 0;
        }

#nav li.top {
        display:inline;
        float:left;
        width: 172px;
        height: 35px;
        }

#nav li a.top_link {
        display:block;
        float:left;
        height:35px;
        line-height:15px;
        color:#FFFFFF;
        text-decoration:none;
        font-size:12px;
        cursor:pointer;
        background: url(../botonera/bg.png) no-repeat;
        width: 172px;
        margin: 0px auto 20px auto;
 	padding: 2px 0 0 20px;
        }

#nav li a.top_link:hover {
        display:block;
        float:left;
        height:35px;
        line-height:15px;
        color:#FFFFFF;
        text-decoration:none;
        font-size:12px;
        cursor:pointer;
        background: url(../botonera/bg_over.png) no-repeat;
        width: 172px;
        margin: 0px auto 20px auto;
        padding: 0px auto 20px auto;
        }