.menuqs a {
  display:block;
  border:none;
  background-position:left top;
  background-repeat:no-repeat;
  width:215px;
  height:45px;
}
.menuqs a:hover { background-position: 0 -45px; text-decoration: none; }
.menuqs .alt { display:none; }

/* Menu Canales */

.menuqs a#qs1 { background-image: url(QuienesS.jpg) }
.menuqs a#pct1 { background-image: url(PlantelesC.jpg) }
.menuqs a#ns1 { background-image: url(NuestrosS.jpg) }
.menuqs a#cr1 { background-image: url(ConalepRep.jpg) }
.menuqs a#pi1 { background-image: url(ProyeccionI.jpg) }
.menuqs a#rdc { background-image: url(rdc1.jpg) }