function WriteCookie (cookieName, cookieValue, expiry) 
{
	var expDate = new Date();

	if(expiry)
	{
		expDate.setTime (expDate.getTime() + expiry);
	    document.cookie = cookieName + "=" + escape (cookieValue) + "; expires=" + expDate.toGMTString();
    }
    else
    {
        document.cookie = cookieName + "=" + escape (cookieValue);
	}
}

function ReadCookie (CookieName)
{
	var CookieString = document.cookie;
	var CookieSet = CookieString.split (';');
	var SetSize = CookieSet.length;
	var CookiePieces
	var ReturnValue = "";
	var x = 0;

	for (x = 0; ((x < SetSize) && (ReturnValue == "")); x++)
	{
		CookiePieces = CookieSet[x].split ('=');
	    if (CookiePieces[0].substring (0,1) == ' ')
		{
			CookiePieces[0] = CookiePieces[0].substring (1, CookiePieces[0].length);
		}
		
		if (CookiePieces[0] == CookieName)
		{
      		ReturnValue = CookiePieces[1];
		}

  	}
	
	return ReturnValue;
}