function afficheLayerTop() {
 	var div = document.getElementById("LayerTop");
	
	div.setAttribute("style", "display:block;position:absolute; height:auto; width:auto; margin:0px 0px 0px 0px");
	//Remplace setAttribute pour IE
	div.style.cssText = "display:block;position:absolute; height:auto; width:auto; margin:0px 0px 0px 0px";
}

function afficheLayerBottom() {
 	var div = document.getElementById("LayerBottom");
	
	div.setAttribute("style", "display:block;position:absolute; height:auto; width:auto; margin:0px 0px 0px 0px");
	//Remplace setAttribute pour IE
	div.style.cssText = "display:block;position:absolute; height:auto; width:auto; margin:0px 0px 0px 0px";
}

function afficheLayerFooter() {
 	var div = document.getElementById("LayerFooter");
	
	div.setAttribute("style", "display:block;position:absolute; height:auto; width:auto; margin:0px 0px 0px 0px");
	//Remplace setAttribute pour IE
	div.style.cssText = "display:block;position:absolute; height:auto; width:auto; margin:0px 0px 0px 0px";
}