.sptab_menu {width:298px;text-align:center;height:25px;margin:0px auto;font-size:12px}

.sptab_menu .off {float:left;width:149px;height:20px;margin-top:5px;background:url(../images/sptab_off.png) no-repeat;}

.sptab_menu .on {float:left;width:149px;height:25px;background:url(../images/sptab_on.png) no-repeat;line-height:25px;}

.sptab_menu a {color:#000;text-decoration:none}