function gielda(link)
{
	var ul = document.getElementById('gielda');
	if (ul.style.display=='') {ul.style.display='block'; link.className='open'; return;}
	if (ul.style.display=='none') {ul.style.display='block'; link.className='open'; return;}
	if (ul.style.display=='block') {ul.style.display='none'; link.className=''; return;}
	return false;
}

function licz(form)
{
	var procent = form.rodzaj.value;
	var podstawa = form.podstawa.value;
	var p = new Date(form.pr.value, form.pm.value, form.pd.value);
	var z = new Date(form.zr.value, form.zm.value, form.zd.value);
	
	if (procent == 0.11) //podatkowe
	{
		var min = new Date (1994,05,13);
		if (p<min)
		{
			form.pr.value='1994';
			form.pm.value='05';
			form.pd.value='13';
			p=min;
		}
	}

	if (procent == 0.115) //podatkowe
	{
		var min = new Date (1991,03,01);
		if (p<min)
		{
			form.pr.value='1991';
			form.pm.value='03';
			form.pd.value='01';
			p=min;
		}
	}

	var dni = (z-p)/(60*60*24*1000);
	dni = Math.round(dni);
	if (dni < 0) dni = 0;
	var odsetki = (podstawa * dni * procent)/365;
	
	odsetki=Math.round(odsetki*100)/100;
	form.dni.value = dni;
	form.odsetki.value = odsetki;
}