#dock {
  margin:0 auto;
  list-style-type:none;
  }
#dock li {
  display:block;
<!--
  float:left;
-->
  }
#dock li a {
  display:block;
  position:relative;
  margin-right:8px;
  }
#dock li a span {
  position:absolute;
  width:100px;
  margin-left:-5000px;
  }
#dock li a img {
  border:0;
  }
#dock li a:hover {
  z-index:100;
  }


#dock li a#img1 {
  width:125px;
  height:91px;
  background:url(Images/Nantucket-White-Other-thumb.jpg) no-repeat;
  }
#dock li a#img2 {
  width:125px;
  height:99px;
  background:url(Images/York-Maple-Fawnthumb.jpg) no-repeat
  }
#dock li a#img3 {
  width:125px;
  height:125px;
  background:url(Images/Winstead-Maple-Fawn-thumb.jpg) no-repeat;
  }
#dock li a#img4 {
  width:125px;
  height:167px;
  background:url(Images/Manchester-Cherry-thumb.jpg) no-repeat;
  }


#dock li a#img1:hover {
  left:-13px;
  top:-14px;
  margin-right:-13px;
  width:490px;
  height:355px;
  background:url(Images/Nantucket-White-Other-Room.jpg) no-repeat;
  }
#dock li a#img2:hover {
  left:-14px;
  top:-12px;
  margin-right:-14px;
  width:500px;
  height:397px;
  background:url(Images/York-Maple-Fawn-Other-Room.jpg) no-repeat;
  }
#dock li a#img3:hover {
  left:-7px;
  top:-14px;
  margin-right:-5px;
  width:500px;
  height:501px;
  background:url(Images/Winstead-Maple-Fawn-Other-R.jpg) no-repeat;
  }
#dock li a#img4:hover {
  left:-10px;
  top:-14px;
  margin-right:-11px;
  width:400px;
  height:533px;
  background:url(Images/Manchester-Cherry-Cognac-Ot.jpg) no-repeat;
  }