#exhaustfansb a:hover,
#supplyfanb a:hover,
#wallflashingb a:hover,
#ventilationb a:hover,
#firesuppressionb a:hover,
#curbsb a:hover  {
   background-position: -272px 0%;
}

#wallflashingb a,
#curbsb a,
#supplyfanb a,
#ventilationb a,
#exhaustfansb a,
#firesuppressionb a  {
   background-repeat: no-repeat;
   display: block;
   height: 204px;
   width: 272px;
   background-position: 0% 0px;
   font-size: 204px;
   line-height: 204px;
}

#firesuppressionb a  {
   background-image: url(NewImages/AirSystemsItemsMedia/firesuppressionb.gif);
}

#firesuppressionb  {
   visibility: visible;
   position: absolute;
   left: 289px;
   top: 70px;
   z-index: 5;
   width: 272px;
   height: 204px;
}

#pid0ventilation  {
   margin: 0px auto 0px auto;
   width: 850px;
   position: relative;
}

#wallflashingb a  {
   background-image: url(NewImages/AirSystemsItemsMedia/wallflashingb.gif);
}

#ventilationb a  {
   background-image: url(NewImages/AirSystemsItemsMedia/ventilationb.gif);
}

#exhaustfansb a  {
   background-image: url(NewImages/AirSystemsItemsMedia/exhaustfansb.gif);
}

#wallflashingb  {
   visibility: visible;
   position: absolute;
   left: 558px;
   top: 70px;
   z-index: 4;
   width: 272px;
   height: 204px;
}

#ventilationb  {
   visibility: visible;
   position: absolute;
   left: 20px;
   top: 70px;
   z-index: 6;
   width: 272px;
   height: 204px;
}

#exhaustfansb  {
   visibility: visible;
   position: absolute;
   left: 20px;
   top: 273px;
   z-index: 4;
   width: 272px;
   height: 204px;
}

#supplyfanb a  {
   background-image: url(NewImages/AirSystemsItemsMedia/supplyfanb.gif);
}

#supplyfanb  {
   visibility: visible;
   position: absolute;
   left: 289px;
   top: 273px;
   z-index: 3;
   width: 272px;
   height: 204px;
}

#curbsb a  {
   background-image: url(NewImages/AirSystemsItemsMedia/curbsb.gif);
}

#layer21  {
   background: url(NewImages/AirSystemsItemsMedia/layer21.gif) no-repeat;
   position: absolute;
   left: 0px;
   top: 0px;
   z-index: 1;
   width: 850px;
   height: 500px;
}

#curbsb  {
   visibility: visible;
   position: absolute;
   left: 558px;
   top: 273px;
   z-index: 2;
   width: 272px;
   height: 204px;
}