function getNextVideo ()
{
 var sUrl = "";
 var nPageId = ReadQueryString("pgid");
 
 if (nPageId.length > 0)
 {
  var sIds = BtReadCookie("pageIds");
  if (sIds != null)
  {
   var m_aIds = sIds.split("|");
   var m_nIndex = m_aIds.length;
   
   ++nPageId;
   if (nPageId > m_nIndex)
       nPageId = 1;

   sUrl = m_aIds[nPageId - 1];
   var nPos = sUrl.indexOf("?");
   if (nPos < 0)
       sUrl += "?pgid=" + nPageId;
  } 
 }
 
 return sUrl;
}