function switchONE($v)
{
    if ($v) 
    {
	document.getElementById("ONEtr").style.display="block";
	document.getElementById("nONEtr").style.display="none";
    } else
    {
	document.getElementById("ONEtr").style.display="none";
	document.getElementById("nONEtr").style.display="block";
    }
}

function switchFacture($v)
{
    if ($v) 
    {
	document.getElementById("div_facture").style.display="block";
    } else
    {
	document.getElementById("div_facture").style.display="none";
    }
}