function zmen(nazev,novy){
  document.images[nazev].src = novy;
}

function openWin( windowURL, windowName){
  return window.open( windowURL, windowName, 'width=700,height=720,toolbar=0,location=0,directories=0,status=0,menuBar=0,scrollBars=0,resizable=0' ) ;
}

function openWin2( windowURL, windowName){
  return window.open( windowURL, windowName, 'width=710,height=720,toolbar=0,location=0,directories=0,status=0,menuBar=0,scrollBars=1,resizable=0' ) ;
}

function newwin2(){
  window.open("","show","width=620,height=590,toolbar=no,directories=no,menubar=no,status=yes,resizable=yes,location=no,scrollbars=yes,copyhistory=no");
  return;
}