div#wn	{ 
	position:relative;
	width:520px; height:160px; 
	overflow:hidden;
	}
div.content { /* hide content to be swapped in */
	position:absolute; visibility:hidden;
	left:0px; top:0px; 
	}
div#lyr1 { /* show first div */
    visibility:visible;
    }
div#scrollbar { 
  position:relative;
  width:10px; height:160px; 
  font-size:1px;  /* so no gap or misplacement due to image vertical alignment */
  }
div#track { 
  position:absolute; left:0; top:12px;
  width:10px; height:136px;
  background: #f0ede6;
  }