div.surface-graphics {
          float: right;
	  position: relative;
	  border-width: 1px;
	  border-style: solid;
	  border-color: black;
	  padding: 0;
	  margin-bottom: 1em;
	  }
div.surface {
	  position: absolute;
	  border-width: 1px;
	  border-style: solid;
	  border-color: yellow;
	  }
div.zone {
	  position: absolute;
	  border-width: 1px;
	  border-style: solid;
	  border-color: blue;
	  display: none;						
	  }