function openRef(y){
  w =600;
  h = 500;
  t = (screen.height - h)/2;
  l = (screen.width - w)/2;
  wnd = window.open(y,y.target,'menubar=yes,scrollbars=yes,status=no,width=' + w + ',height=' + h + ',top=' + t + ', left = ' + l);
  wnd.moveTo(l,t);
  return wnd;
}

// Fonction d'ouverture de fenetre popup centree
// Simon - egzakt.com
// 2004-10-28
//
function egz_openwindow(lien,cible,w,h) {
	var _win;
	_win = window.open(lien,cible,'width=' + w + ',height=' + h + ',top=' + (screen.height - 400)/2 + 'left='+ (screen.width - 400)/2);
	_win.moveTo((screen.width - w)/2,(screen.height - h)/2);
	_win.focus();

	return _win;
}

// Fonction d'ouverture de fenetre popup centree
// Simon - egzakt.com
// 2004-10-28
//
function egz_openwindow_param(lien,cible,w,h,param) {
	var _win;
	_win = window.open(lien,cible,param);
	_win.moveTo((screen.width - w)/2,(screen.height - h)/2);
	_win.focus();

	return _win;
}