function addCookie(szName,szValue,dtDaysExpires) 
{
   var dtExpires = new Date();
   var dtExpiryDate = "";

   dtExpires.setTime(dtExpires.getTime() + 
     dtDaysExpires * 24 * 60 * 60 * 1000);

   dtExpiryDate = dtExpires.toGMTString();

   document.cookie = szName + "=" + szValue + "; expires=" + dtExpiryDate;
}



function findCookie(szName) 
{
	if(!szName) return "";
  var i = 0;
  var nStartPosition = 0;
  var nEndPosition = 0;  
  var szCookieString = document.cookie;  

  while(i <= szCookieString.length) 
  {
    nStartPosition = i;
    nEndPosition = nStartPosition + szName.length;

    if(szCookieString.substring( 
        nStartPosition,nEndPosition) == szName) 
    {
      nStartPosition = nEndPosition + 1;
      nEndPosition = 
        document.cookie.indexOf(";",nStartPosition);

      if(nEndPosition < nStartPosition)
        nEndPosition = document.cookie.length;
		
      return document.cookie.substring(nStartPosition,nEndPosition);  
      break;    
    }
    i++;  
  }
  return "";
}



function removeCookie(szName) 
{
  var dtExpires = new Date();
  dtExpires.setTime(dtExpires.getTime() - 1);

  var szValue = findCookie(szName);

  document.cookie = szName + "=" + szValue +
    "; expires=" + dtExpires.toGMTString();
}