function confirmOperation(tekst){
  return confirm(tekst);
}

function openWindow(url){
  window.open(url,'popup','left=200, top=100, width=650, height=470, location=no, menubar=no, status=no, toolbar=no, scrollbars=yes, resizable=yes');
}

function toggleVisible(objectId){
  if(document.getElementById(objectId).style.display=='')
    document.getElementById(objectId).style.display='none';
  else
    document.getElementById(objectId).style.display='';
}