function SetCookie(sName, sValue)
{
  document.cookie = sName + "=" + sValue;
}

function GetCookie(sName)
{
  var aCookie = document.cookie.split("; ");
  for (var i=0; i < aCookie.length; i++)
  {
    var aCrumb = aCookie[i].split("=");
    if (sName == aCrumb[0]) 
      return aCrumb[1];
  }
  return null;
}

function DeleteCookie(sName)
{
  document.cookie = sName + "=; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}