#id_bkgr {
background-color:transparent;
position:absolute;
visibility:show;
overflow:visible;
left:0px;
top:0px;
width:960px;
height:580px;
z-index:1;
}

#id_lien {
background-color:transparent;
position:absolute;
visibility:show;
overflow:visible;
left:0px;
top:0;
width:686px;
height:357px;
z-index:2;
}