function GetCookieValue(cookieName)
{
  var cookieValue=document.cookie;
  var cookieStartsAt=cookieValue.indexOf(" "+cookieName+"=");
  if (cookieStartsAt==-1)
  {cookieStartsAt=cookieValue.indexOf(cookieName+"=");}
  if (cookieStartsAt==-1)
  {cookieValue=null;}
  else
  {
    cookieStartsAt=cookieValue.indexOf("=",cookieStartsAt)+1;
    var cookieEndsAt=cookieValue.indexOf(";",cookieStartsAt);
    if (cookieEndsAt==-1)
    {cookieEndsAt=cookieValue.length;}
    cookieValue = unescape(cookieValue.substring(cookieStartsAt,cookieEndsAt));
  }
  return cookieValue;
}

function setCookie(cookieName,cookieValue,cookieExpires)
{
  cookieValue=escape(cookieValue);
  if (cookieExpires=="" || cookieExpires==null)
  {document.cookie=cookieName+"="+cookieValue;}
  else
  {document.cookie=cookieName+"="+cookieValue+";expires="+cookieExpires;}
}