function openWindow (url,param) {
	window.open (url, '', param);
}

function nz_open_centered_window (u, n, w, h, p) {
  lp = (screen.width) ? (screen.width - w) / 2 : 100;
  tp = (screen.height) ? (screen.height - h) / 2 : 100;
  return window.open (u, n, 'width='+w+',height='+h+',top='+tp+',left='+lp+','+p);
}