Mon3 = ["január", "február", "március", "április", "május", "június", "július", "augusztus", "szeptember", "október", "november", "december"];

if(plang=='en' || plang=='de') Mon3 = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];

  Day3 = ['vas','hétf','kedd','szerd','csüt','pén','szomb']; 

function Lz(x) { return (x<0||x>=10?"":"0") + x /* local */ }

function LengthOfMonth(Y, M) { // M=1..12 // OK in NS4? Mac?
  with (new Date(Y,M,1,12)) { setDate(0) ; return getDate() } }



var D_Opt = new Array();

function MonLen(Yr, Mo, Dy) { var Dol, K, DiM, NsI
  DiM = LengthOfMonth(+Yr.options[Yr.selectedIndex].text,
    Mo.selectedIndex+1)
  Dol = Dy.options.length
  if ( (NsI = Dy.selectedIndex) >= DiM ) NsI = DiM-1
// for (K=Dol   ; K >DiM ; K--) Dy.options[K-1] = null
// for (K=Dol+1 ; K<=DiM ; K++) Dy.options[K-1] = new Option(K)
  for (K=Dol   ; K >DiM ; K--)
    { D_Opt[K] = Dy.options[K-1] ; Dy.options[K-1] = null }
  for (K=Dol+1 ; K<=DiM ; K++)   Dy.options[K-1] = D_Opt[K]
  Dy.selectedIndex = NsI }

function DropReadYMD(Yr, Mo, Dy) {
  var Y = + Yr.options[Yr.selectedIndex].text
  var M = Mo.selectedIndex // 0..11
  var D = Dy.selectedIndex + 1
  return Y + '-' + Lz(M+1) + '-' + Lz(D) + ', ' +
    Day3[new Date(Y, M, D).getDay()] }

function InitYMDselector(Yr, Mo, Dy, Anni, Base, SetObj) { var J
  if (!Base) Base = new Date().getFullYear()
  for (J=0; J<Anni; J++) Yr.options[J] = new Option(Base+J)
  for (J=0;  J<12 ; J++) Mo.options[J] = new Option(Mon3[J])
  for (J=0;  J<31 ; J++) Dy.options[J] = new Option(J+1)
  if (SetObj) with (SetObj) {
    Yr.selectedIndex = getFullYear()-Base
    Mo.selectedIndex = getMonth()
    Dy.selectedIndex = getDate()-1 }
  else Yr.selectedIndex = Mo.selectedIndex = Dy.selectedIndex = 0
  MonLen(Yr, Mo, Dy) }

var Now, YearSpan = 2,
  BaseYear = (Now = new Date()).getFullYear()

with (document.forms['form1'])
InitYMDselector(from_ev, from_ho, from_nap, YearSpan, BaseYear, Now)
with (document.forms['form1'])
InitYMDselector(to_ev, to_ho, to_nap, YearSpan, BaseYear, Now)