//er wordt vanuit gegaan dat het altijd laagseizoen is
//de volgende perioden is het middenseizoen
var middenseizoen = new Array(
new Array(20090605,20090607),
new Array(20090612,20090614),
new Array(20090619,20090621),
new Array(20090626,20090628),
new Array(20090814,20090816),
new Array(20090821,20090823),
new Array(20090828,20090830),
new Array(20090904,20090906),
new Array(20090911,20090913),
new Array(20090918,20090920),
new Array(20090925,20090927),
new Array(20091002,20091004),
new Array(20091009,20091011),
new Array(20091016,20091018),
new Array(20091023,20091025),
new Array(20091030,20091101),
new Array(20100409,20100411),
new Array(20100416,20100418),
new Array(20100423,20100425),
new Array(20100528,20100530),
new Array(20100604,20100606),
new Array(20100611,20100715),
new Array(20100823,20100912),
new Array(20100917,20100919),
new Array(20100924,20100926)
);

//de volgende perioden zijn feest/vakantiedagen (hoogseizoen)
var hoogseizoen = new Array(
new Array(20090101,20090104),
new Array(20090213,20090301),
new Array(20090410,20090413),
new Array(20090424,20090503),
new Array(20090518,20090524),
new Array(20090529,20090531),
new Array(20090703,20090813),
new Array(20091221,20091231),
new Array(20100101,20100103),
new Array(20100219,20100228),
new Array(20100402,20100405),
new Array(20100430,20100509),
new Array(20100513,20100516),
new Array(20100521,20100524),
new Array(20100716,20100822),
new Array(20101015,20101031),
new Array(20101224,20101231)
);