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;
mocnina = Math.pow(1+(urok/12),pocet_splatek);
anuita = (uver*(urok/12)*mocnina)/(mocnina-1)
anuita_round = Math.round(anuita);
document.formCs.mesicni_splatka.value = anuita_round;
}

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();
};