function changeTexts(form)
{
  new_alias = hex_md5(form.alias.value);
  new_heslo = hex_md5(form.heslo.value);

  var name = "tta" + Math.round(Math.random()*1000);  

  window.open("http://77.48.186.30/tta/LoginPage.aspx?alias="+new_alias+"&heslo="+new_heslo, name, "scrollbars=1,toobar=0,menubar=0,resizable=1");
  
  form.alias.value = "";
  form.heslo.value = "";
  
  return false;
}
function SwapImage (imgSrc, imgId)
{
  imgId.src = "artwork/menu/"+imgSrc;  
}

function SwitchLan(pic, over, lan)
{
  
  if(pic.id == "switcherleft"){
    if(over == 1){
      pic.src = "artwork/switcher/panacek-left-up.gif";
      document.getElementById("switcherright").src = "artwork/switcher/panacek-right-down.gif";
    } else {
      if(lan != 'cze'){
        pic.src = "artwork/switcher/panacek-left-down.gif";
        document.getElementById("switcherright").src = "artwork/switcher/panacek-right-up.gif";
      } else {
        pic.src = "artwork/switcher/panacek-left-up.gif";
      }
    }
  }
  if(pic.id == "switcherright"){
    if(over == 1){
      pic.src = "artwork/switcher/panacek-right-up.gif";
      document.getElementById("switcherleft").src = "artwork/switcher/panacek-left-down.gif";
    } else {
      if(lan != 'eng'){
        pic.src = "artwork/switcher/panacek-right-down.gif";
        document.getElementById("switcherleft").src = "artwork/switcher/panacek-left-up.gif";
      } else {
        pic.src = "artwork/switcher/panacek-right-up.gif";
      }
    }
  }
}

function CheckFJazykovyTest(form)
{
  re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$");
  if(form.jmeno1.value == "")
  {
    window.alert('Jméno musíte vyplnit!');
    return false;
  }
  if(form.jmeno2.value == ""){
    window.alert('Příjmení musíte vyplnit!');
    return false;
  }
  if(!re.test(form.email.value)){
    window.alert('Zadaná e-mailová adresa není ve správném formátu!');
    return false;
  }
}