function GetCookie(name)
{
  var start = document.cookie.indexOf(name + "=");
  var len = start + name.length + 1;
  if ((!start) && (name != document.cookie.substring(0, name.length)))
  {
    return null;
  }
  if (start == -1) return null;
  var end = document.cookie.indexOf(";", len);
  if (end == -1) end = document.cookie.length;
  return unescape(document.cookie.substring(len, end));
}

function SetCookie(name, value, expires, path, domain, secure)
{
  var today = new Date();
  today.setTime( today.getTime() );
  if (expires)
  {
    expires = expires * 1000 * 60 * 60 * 24;
  }
  var expires_date = new Date(today.getTime() + (expires));
  document.cookie = name + "=" + escape(value) +
    ((expires) ? ";expires=" + expires_date.toGMTString() : "") + 
    ((path) ? ";path=" + path : ";path=/") +
    ((domain) ? ";domain=" + domain : "") +
    ((secure) ? ";secure" : "");
}

function DeleteCookie(name, path, domain)
{
  if (GetCookie(name)) document.cookie = name + "=" +
    ((path) ? ";path=" + path : "") +
    (( domain) ? ";domain=" + domain : "" ) +
    ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}