var monPopup;

function affichage_popup(nom_de_la_page)
{
	if (monPopup != undefined) monPopup.close();
	monPopup = window.open (nom_de_la_page, 'popup_1', config='fullscreen=no, height=500, width=800, left=100, top=100, toolbar=no, menubar=no, scrollbars=yes, resizable=no, location=no, directories=no, status=no');
	monPopup.focus();
}