function setCookie(c_name, value, expireDays)
{
  var expiryDate = new Date();
  expiryDate.setDate(expiryDate.getDate() + expireDays);

  document.cookie = c_name + '=' + escape(value) + ( (expireDays == null) ? '' : ';expires=' + expiryDate.toGMTString() );
}

function getCookie(c_name)
{
  if ( document.cookie.length > 0 )
  {
    c_start = document.cookie.indexOf(c_name + '=');
    if ( c_start != -1 )
    {
      c_start = c_start + c_name.length + 1;
      c_end   = document.cookie.indexOf(';', c_start);
      if ( c_end == -1 ) c_end = document.cookie.length;

      return unescape(document.cookie.substring(c_start, c_end));
    }
  }
  return '';
}