.calque1{position:relative; left:0px; top:0px; width:300px; height:60px; z-index:1; }<br>
<div id="Layer1" style="font-weight:normal; position:relative; left:0px; top:0px; width:300px; height:60px; z-index:1; background-color: #CC0000; ">Exemple d'utilisation de left </div>
.calque2{position:relative; left:100px; top:0px; width:300px; height:60px; z-index:10; }
<div id="Layer2" style="font-weight:normal; position:relative; left:100px; top:0px; width:300px; height:60px; z-index:10; background-color: green; ">Exemple d'utilisation de left </div>
.calque1{position:relative; left:0px; top:0px; width:300px; height:60px; z-index:1; }
