var Ready = false;
document.ready = create();

function create() { Ready = true; }
	
function f1(a) { 
	oBj = document.Kalkulator;
	if (!isReady()) return false;
	for (var i=0;i<oBj.rodzaj_mieszkania.length;i++) { 
		oBj.rodzaj_mieszkania[i].checked?changeData(i):false; 
		}
}

function changeData(i) {
	oBj = document.Kalkulator;
	switch (i) {
	case 0: oBj.oplata_sadowa.value = '0.00'; break;
	case 1: oBj.oplata_sadowa.value = '200.00'; break;
	case 2: oBj.oplata_sadowa.value = '200.00'; break;
	}
	refreshCalc();
}
function isReady() { 
	if (!isReady) {
		alert('Nie skończono ładowania strony, proszę poczekać!');
		return false;
		} else {
	return true;	
	}
}

function refreshCalc() {
	oBj = document.Kalkulator;
	var CT = 0;
	CT = oBj.cena_transakcyjna.value;
	var reg = new RegExp("\\d{1,}");
	var PN = oBj.prowizja_nieruchomosci.value;
	
	if (!IsNumeric(PN) || PN<0) { PN = 2; oBj.prowizja_nieruchomosci.value = 2; }
	if (!IsNumeric(CT)) clearForm();
	
	var OpS;
	
	var TN = 0;
	var PO = 0;
	var OS = 0;
	oBj.rodzaj_mieszkania[2].checked?OpS=true:OpS=false;
	
	PO = oBj.podatek_od_czynnosci.value = CT * 2/100;
	OS = oBj.oplata_sadowa.value * 1;
	oBj.podatek_od_czynnosci.value = round2(PO);
	if (!OpS && CT>0) {
		if ((CT > 0) && (CT <= 3000)) TN = 100;
		else if ((CT > 3000) && (CT <= 10000)) TN = (100 + ((CT - 3000)*0.03))/2;
		else if ((CT > 10000) && (CT <= 30000)) TN = (310 + ((CT - 10000)*0.02))/2;
		else if ((CT > 30000) && (CT <= 60000)) TN = (710 + ((CT - 30000)*0.01))/2;	
		else if ((CT > 60000) && (CT <= 1000000)) TN = (1010 + ((CT - 60000)*0.004))/2;
		else if ((CT > 1000000) && (CT <= 2000000)) TN = (4770 + ((CT - 1000000)*0.002))/2;
		else if (CT > 2000000) TN = (6770 + ((CT - 2000000)*0.0025))/2;
	} else if (CT>0) {
		if ((CT > 0) && (CT <= 3000)) TN = 100;
		else if ((CT > 3000) && (CT <= 10000)) TN = (100 + ((CT - 3000)*0.03));
		else if ((CT > 10000) && (CT <= 30000)) TN = (310 + ((CT - 10000)*0.02));
		else if ((CT > 30000) && (CT <= 60000)) TN = (710 + ((CT - 30000)*0.01));	
		else if ((CT > 60000) && (CT <= 1000000)) TN = (1010 + ((CT - 60000)*0.004));
		else if ((CT > 1000000) && (CT <= 2000000)) TN = (4770 + ((CT - 1000000)*0.002));
		else if (CT > 2000000) TN = (6770 + ((CT - 2000000)*0.0025));
	} else TN = 0.00;
	
	TN = (Math.round(TN * 100))/100;
	oBj.taksa.value	= round2(TN);
	var TV = oBj.taksa_vat.value = round2(TN*0.23);
	
	var PR_B = oBj.prowizja_nieruchomosci_brutto.value = round2(CT * (PN/100) + (CT * (PN/100))*0.23);
	var PR_N = oBj.prowizja_nieruchomosci_netto.value = round2(CT * (PN/100));
	oBj.vat.value = round2((CT * (PN/100))*0.23);
	var SO = TN + PO + OS + PR_N + TV;
	SO*=1;
	CT*=1;
	oBj.suma_oplat.value = round2(SO);
	oBj.suma_do_zaplaty.value = round2(SO + CT);
	return false;
	}
function IsNumeric(sText) {
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

   for (i = 0; i < sText.length && IsNumber == true; i++) { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) {
         IsNumber = false;
         }
      }
   return IsNumber;
}
function clearForm() {
oBj = document.Kalkulator;
oBj.cena_transakcyjna.value = 0.00;
refreshCalc();
oBj.cena_transakcyjna.value = 'niepoprawne dane';
}
function round2(liczba) {
liczba = liczba * 100;
var wynik = Math.round(liczba)/100;
return wynik;
}