function FadeIn() 
{  
  mint.fx.Fade("slideshow_img_container", 100, 30, 50, null, function() { Time();} ); 
} 

function FadeOut() 
{ 
  mint.fx.Fade("slideshow_img_container", 0, 30, 50, null, function() { Refresh(); }); 
} 

function Refresh()
{
  if(count>ile_zdjec-1) count = 0;
  SlideShow(count);
}

function SlideShow(aktualne) 
{ 
  var req = mint.Request();
  clearTimeout(t);
  count = aktualne;
  count++;
   
  SetOpacity("slideshow_img_container", 0)
  req.AddParam("aktualne", aktualne);
  req.Send("includes/pobierz_zdjecie.php");
    
  req.OnSuccess = function()
  {
    FadeIn();
    eval(this.responseText);
  }
  
} 

function Time() 
{ 
  t = setTimeout(FadeOut,3000); 
} 

function sprawdzEmail()
{
  var email = document.getElementById('email').value;
  var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
  
  if(regex.test(email)==false)
    {
      alert('Podany adres e-mail jest niepoprawny!');
      return false;
    }
  else return true;
}

function sprawdzFormularz()
{
  var imie = document.getElementById('imie').value;
  var email = document.getElementById('email').value;
  var tresc = document.getElementById('tresc').value;  
  var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
  
  if(regex.test(email)==false || imie=='' || tresc=='')
    {
      alert('Proszę poprawnie wypełnić formularz!');
      return false;
    }
  else return true;
}

function pokaz_liste() 
{
  var container=$('drop_down_list_container');
  
  container.style.display='block';
}

function ukryj_liste()
{
  $('drop_down_list_container').style.display='none';
}

function zoom(size)
{
  document.getElementById('middle').style.fontSize=size+"px";
}