function checkUrl(tabarr, seltab)
{
  currenturl = location.href;
  pdz = currenturl.indexOf("?");
  if (pdz <= 0) return seltab;
  dz = currenturl.substr(pdz + 1);
  count = tabarr.length;
  for (i = 0; i < count; i ++)
  {
    if ((tabarr[i][1]) && (tabarr[i][1] == dz)) return i;
  }
  return seltab;
}