function shut_facture_form()
{
document.getElementById("facture_form").style.display = 'none';
//document.getElementById("facture_form").setAttribute("style", "display: none;");
}
function open_facture_form()
{
document.getElementById("facture_form").style.display = 'block';
//document.getElementById("facture_form").setAttribute("style", "display:block;");
}