function nastavDatum (idden1,idmesic1,idrok1,idden2,idmesic2,idrok2)
{
	var den,mesic,rok,den_tmp;
	var datum,datum_tmp;

	den = document.getElementById(idden1).value;
	den *= 1;
	den_tmp = den;
	den += 1;
	mesic = document.getElementById(idmesic1).value;
	mesic *= 1;
	mesic -= 1;

	rok = document.getElementById(idrok1).value;
	datum = new Date (rok,mesic,den);
	datum_tmp = new Date (rok,mesic,den_tmp);

	if (den_tmp != datum_tmp.getDate())   // Spatne datum, napriklad 31.6.
	{
		while (den_tmp != datum_tmp.getDate())
		{
			den_tmp -= 1;
			datum_tmp = new Date (rok,mesic,den_tmp);
		}
		document.getElementById(idden1).value = den_tmp;
		datum = new Date (rok,mesic,den_tmp+1);
	}

	document.getElementById(idden2).value = datum.getDate();
	document.getElementById(idmesic2).value = datum.getMonth() + 1;
	document.getElementById(idrok2).value = datum.getFullYear();
}