// Create a cookie with the specified name and value.
// The cookie expires at the end of the 20th century.
function SetCookie(sName, sValue)
{
  document.cookie = sName + "=" + escape(sValue) + ";expires=Mon, 31 Dec 1999 23:59:59;";
}


// Retrieve the value of the cookie with the specified name.
function GetCookie(sCookie)
{
  // cookies are separated by semicolons
  var aCookie = document.cookie.split(";");
  for (var i=0; i < aCookie.length; i++)
  {
    // a name/value pair (a crumb) is separated by an equal sign
    var aCrumb = aCookie[i].split("=");
    if (sName == aCrumb[0]) 
      return unescape(aCrumb[1]);
  }

  // a cookie with the requested name does not exist
  return null;
}