.izl-rmenu{position:fixed; right:40px;  bottom:40px;  z-index:999; }
            .izl-rmenu .btn{width:72px; height:73px; margin-bottom:1px; cursor:pointer; position:relative;} .izl-rmenu .btn-top{background:url(../image/r_top.png) center center no-repeat; background-color:#666666; display:none;}
                 .izl-rmenu .btn-top:hover{background-color:#444;}