function UploadFile(i)
{
	$('file-input'+i).value = Form.Element.getValue('soubor'+i);
}

function clearField(element, defaulVal)
{
	if(element.value == defaulVal) {
		element.value = '';
	}
}

function createBookmarkLink(title, url) 
{
	if (window.sidebar) { // Mozilla Firefox Bookmark
		window.sidebar.addPanel(title, url, "");
		return false;
	} 
	else if( window.external ) { // IE Favorite
		window.external.AddFavorite( url, title);
		return false;
	}
	else if(window.opera && window.print) { // Opera Hotlist
		return true; 
	}
}

function changeTab(elementId) 
{
	var tabs = $$('#nejctenejsi .article-list');

	for(var i = 0; i < tabs.length; i++) {

		tabs[i].hide();
	}
	
	$(elementId).show();
	
	return false;
}

function setView(coverId)
{
	var url = '/stranka/stranka-ajax-response.php?obalka_id=' + coverId;
  
  	new Ajax.Request(url, { method: 'get' });
	
	return false;
}

function setViewFoto(fotoId)
{
	var url = '/stranka/stranka-ajax-response.php?obrazek_id=' + fotoId;
  
  	new Ajax.Request(url, { method: 'get' });
	
	return false;
}

function returnKeyCode(e)
{
  var key; 
  if(window.event) key = window.event.keyCode;     //IE
  else key = e.which;     //firefox  
  return key;        
}

function disableEnterKey(e)
{
     var key;     
     if(window.event)
          key = window.event.keyCode; //IE
     else
          key = e.which; //firefox     
     
     if(key == 13) return false;
     else return true;
}

function enableEnterKey(e,id)
{     
     var key;     
     if(window.event)
          key = window.event.keyCode; //IE
     else
          key = e.which; //firefox     
     
     if(key == 13) 
     {
        $(id).value += "\n";
     }     
}

function enableEnterKeyFormSubm(e,id)
{     
     var key;     
     if(window.event)
          key = window.event.keyCode; //IE
     else
          key = e.which; //firefox     
     
     if(key == 13) 
     {
        $(id).submit();
     }     
}

function animace(id)
{
  $('label-'+id).addClassName('activepromo'+id);      
}        

function stopanimace(id)
{
  $('label-'+id).removeClassName('activepromo'+id);    
}

function isEmpty(pol) 
{ 
  if ((typeof(pol) == "undefined") || (pol == '')) 
  {
    return true;
  } else 
  {
    return false;  
  }
}