.l0t0 {
position: absolute;
width: 800px;
left: 0px;
margin-left:0px;
top: 0px;
margin-top:0px;
height: 100px;
background-color: transparent;
}
.l50t0 {
position: absolute;
width: 800px;
left: 50%;
margin-left:-400px;
top: 0px;
margin-top:0px;
height: 100px;
background-color: transparent;
}