var tableLayer1 = new Array("dv_echange","dv_billetSimple","dv_derniereMinute");
var tableLayer2 = new Array("dv_gv","dv_proPremiere","dv_restauration","dv_taxi");
function hidelayer(id){
	if (id == 1){
		for(i=0;i<tableLayer1.length;i++)
			document.getElementById(tableLayer1[i]).style.display = "none";
	}
	if (id == 2){
		for(i=0;i<tableLayer2.length;i++)
			document.getElementById(tableLayer2[i]).style.display = "none";
	}
}
function showLayer(id,table){
	hidelayer(table);
	document.getElementById(id).style.display = "block";
}