function popup(a){
	b = (popup.arguments.length > 1)? popup.arguments[1] : 'width=650,height=200';
	a = RACINE +'pages/sejour/popup.php?id=' + a;
	pop(a, b);
}


function pop(a, b){
	nwin = window.open(a, 'nwin', b);
	setTimeout('nwin.focus()', 500);
}