function modif_texte(id)
{
	for (i= 1; i <= 4; i++) {
		if (id == i) {
			document.getElementById("zoneTxt" + i).style.display = "block";
			document.getElementById("roll"+i).className = "active";
		}
		else {
			document.getElementById("zoneTxt" + i).style.display = "none" ;
			document.getElementById("roll"+i).className = "";
		}
	}
}

function modif_formule(id)
{
	for (i= 1; i <= 3; i++)
		if (id == i)
			document.getElementById("zoneFormule" + i).style.display = "block";
		else
			document.getElementById("zoneFormule" + i).style.display = "none";
}

function modif_table(id)
{
	for (i= 1; i <= 3; i++)
		if (id == i)
		{
			document.getElementById("zoneTable" + i).style.display = "block";
		}
		else
		{
			document.getElementById("zoneTable" + i).style.display = "none";
		}
}