var trukme = new Array();

trukme[1] = new Array();
trukme[1][12] = 10;
trukme[1][18] = 10;
trukme[1][24] = 15;
trukme[1][36] = 15;
trukme[1][48] = 15;
trukme[1][60] = 20;

trukme[2] = new Array();
trukme[2][12] = 10;
trukme[2][18] = 15;
trukme[2][24] = 15;
trukme[2][36] = 15;
trukme[2][48] = 20;
trukme[2][60] = 20;

trukme[3] = new Array();
trukme[3][12] = 15;
trukme[3][18] = 15;
trukme[3][24] = 15;
trukme[3][36] = 20;
trukme[3][48] = 20;
trukme[3][60] = 20;

trukme[4] = new Array();
trukme[4][12] = 15;
trukme[4][18] = 15;
trukme[4][24] = 20;
trukme[4][36] = 20;
trukme[4][48] = 20;
trukme[4][60] = 25;

trukme[5] = new Array();
trukme[5][12] = 20;
trukme[5][18] = 20;
trukme[5][24] = 20;
trukme[5][36] = 20;
trukme[5][48] = 25;
trukme[5][60] = 25;

trukme[6] = new Array();
trukme[6][12] = 20;
trukme[6][18] = 25;
trukme[6][24] = 25;
trukme[6][36] = 25;
trukme[6][48] = 30;

trukme[7] = new Array();
trukme[7][12] = 25;
trukme[7][18] = 25;
trukme[7][24] = 25;
trukme[7][36] = 30;

trukme[8] = new Array();
trukme[8][12] = 30;
trukme[8][18] = 30;
trukme[8][24] = 40;

trukme[9] = new Array();
trukme[9][12] = 30;
trukme[9][18] = 40;

function getAvansoOptions(){
	var avansas_select = document.getElementById('avansas');
	var avansas_value = avansas_select.value;
	var i;
	var last = '';
	
	for (i = avansas_select.options.length - 1; i >= 0; i--) avansas_select.options[i] = null;
	//while (avansas_select.childNodes.length > 0) avansas_select.removeChild(avansas_select.childNodes[0]);

	i = 0;
	for (key in trukme[metai]){
		if (last != trukme[metai][key]){
		avansas_select.options[i] = new Option(trukme[metai][key] + ' %',trukme[metai][key]);
		i += 1;
		last = trukme[metai][key];
		}
	}
	if (last < 30){
		avansas_select.options[i] = new Option(30 + ' %',30); i += 1;
	}
	if (last < 40){
		avansas_select.options[i] = new Option(40 + ' %',40); i += 1;
	}
	avansas_select.options[i] = new Option(50 + ' %',50); i += 1;
	avansas_select.options[i] = new Option(60 + ' %',60); i += 1;
	avansas_select.options[i] = new Option(70 + ' %',70); i += 1;
	
	for (i = 0; i < avansas_select.options.length; i++){
		if(avansas_select.options[i].value == avansas_value) {avansas_select.selectedIndex = i; break;}
	}
}

function getTerminoOptions(){
	var terminas_select = document.getElementById('terminas');
	var terminas_value = terminas_select.value;
	var avansas_select = document.getElementById('avansas');
    var avansas_value = avansas_select.value;
    var i;
    
    for (i = terminas_select.options.length - 1; i >= 0; i--) terminas_select.options[i] = null;
	
	i = 0;
	for (key in trukme[metai]){
		if (trukme[metai][key] <= avansas_value){
			terminas_select.options[i] = new Option(key + msgMonthShort, key);
			if(key == terminas_value) terminas_select.selectedIndex = i;
			i += 1;
		}
	}
}

function calculate() {
	var avansas = document.getElementById('avansas').value;
	var terminas = document.getElementById('terminas').value;
	var pImoka = document.getElementById('PradineImoka');
	var mImoka = document.getElementById('MenesioImoka');
	var PradineImoka = kaina * avansas / 100;
	var finSuma = kaina - PradineImoka;
	var a = (1 - (1 / Math.pow((1 + menPalukNorma), terminas) )) / menPalukNorma;
	var MenesioImoka = finSuma / a
	pImoka.innerHTML = Math.round(PradineImoka);
	mImoka.innerHTML = Math.round(MenesioImoka);
}