var w = window;
var d = document;

// 4. CS

function vypocet_cs () {
var splatnost
var uver
var urok
var pocet_splatek
var mocnina
var anuita

uver = document.formCs.cena.value;

splatnost = document.formCs.doba_splatnosti.options[document.formCs.doba_splatnosti.options.selectedIndex].value

urok = urokext;
pocet_splatek = splatnost * 12;

IRT = (365.0 / 360.0) * urok / 12.0;
horni = (Math.pow((1.0 + IRT), pocet_splatek) * IRT);
spodni = (Math.pow((1.0 + IRT), pocet_splatek) - 1.0);
splatka = Math.round((horni / spodni) * uver);

document.formCs.mesicni_splatka.value = splatka;
}


var et = {
    addListener : function (where, when, what) {
        if (where.addEventListener) {
            where.addEventListener(when, what, false);
            return true;
        }
        if (where.attachEvent) {
            where.attachEvent('on' + when, function(){ what(et.getIeEvent()); });
            return true;
        }
        return false
    },
    getIeEvent : function() {
        e = w.event;
        e.target = e.srcElement;
        e.preventDefault = function() {e.returnValue = true;}
        e.stopPropagation = function() {e.cancelBubble = true;}
        return e;
    }
}

function submitForm(){
    var form = document.getElementById("cs-kalkulator-form");
    et.addListener(form, 'click', function(e){form.submit()});

    var formInputs = form.getElementsByTagName("input");
    var formSelects = form.getElementsByTagName("select");

    for(i = 0, count = formInputs.length; i < count; i++){
        if(formInputs[i].type != "submit"){
            et.addListener(formInputs[i], 'click', function(e){e.stopPropagation();});
        }
    }

    for(i = 0, count = formSelects.length; i < count; i++){
        et.addListener(formSelects[i], 'click', function(e){e.stopPropagation();});
    }
}

window.onload = function(){
    submitForm();
};