// paleidziamoji funkcija
function calculate(){
    var fieldValues = new Array;
    var fieldsSum = 0;
	var skaiciukas = document.forma.skaicius.value;
    var calcualteFields = getCalculateFields();
    for(var i = 0; i < calcualteFields.length; i++){
        fieldsSum += calcualteFields[i];
    }
	
    printResult(fieldsSum);
	
	if (skaiciukas == ''){skaiciukas = 1;}
	printResultKv(Math.round((fieldsSum/skaiciukas)*100)/100);
}

function getCalculateFields(){
    var fieldParent  =  $('sideright').getElementsByClassName('kaina');
    var calcualteFields = new Array;
    for(var i = 0; i < fieldParent.length; i++){
        var price = $(fieldParent[i]).getElementsByClassName('suma');
        var count = $(fieldParent[i]).getElementsByClassName('kiekis');
        calcualteFields.push(price[0].innerHTML * count[0].value);
    }
    return calcualteFields;
}


function getFieldValue(field){
    var value;
    if(field != null){
        value = field.innerHTML;
    }
    return value;
}

function printResult(sum){
    var fieldParent  =  $('sideright').getElementsByClassName('darbu-suma');
    var resultField = $(fieldParent[0]).getElementsByClassName('suma');
    resultField[0].innerHTML = sum;
}

function printResultKv(kvk){
	var fieldParent = $('sideright').getElementsByClassName('kvadrato-kaina');
	var resultField = $(fieldParent[0]).getElementsByClassName('suma');
	resultField[0].innerHTML = kvk;
}