div { border:0px solid #888; }

#t1 {
	background-color: #ffffff;
	border: none;
	width: 100%;
	position: relative;
}

#a1 { position:absolute; top:100px; left:340px; width:150px; height:60px;
      z-index:1; background-color:#ffffff; }
#a2 { position:absolute; top:220px; left:210px; width:150px; height:60px;
      z-index:2; background-color:#ffffff; }
#a3 { position:absolute; top:360px; left:260px; width:150px; height:60px;
      z-index:3; background-color:#ffffff; }
#a4 { position:absolute; top:140px; left:600px; width:150px; height:60px;
      z-index:4; background-color:#ffffff; }
#a5 { position:absolute; top:260px; left:650px; width:150px; height:60px;
      z-index:5; background-color:#ffffff; }
#a6 { position:absolute; top:380px; left:580px; width:150px; height:60px;
      z-index:6; background-color:#ffffff; }
#a7 { position:absolute; top:450px; left:400px; width:150px; height:60px;
      z-index:7; background-color:#ffffff; }