function popup(page) {
	if (screen.width == "1600"){
	var gcv = (screen.width+550)/2;
	}else if (screen.width == "1280"){
	var gcv = (screen.width-210)/2;
	}else{
	var gcv = (screen.width-400)/2;
	}
	var htv = (screen.height-430)/2;
	window.open(page,'formulaire','width=400,height=430,top='+htv+',left='+gcv+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,noresize');
	}