function mailpageEN()
{
  mail_str = "mailto:?subject=Check out the " + document.title;
  mail_str += "&body=I thought you might be interested in the " + document.title;
  mail_str += ". You can view it at: " + location.href;
  location.href = mail_str;
}

function mailpageCS()
{
  mail_str = "mailto:?subject=Podívej se na " + document.title;
  mail_str += "&body=Myslel jsem, že by tě mohlo zajímat " + document.title;
  mail_str += ". Najdeš to na: " + location.href;
  location.href = mail_str;
}

function mailpageES()
{
  mail_str = "mailto:?subject=Mira esto " + document.title;
  mail_str += "&body=Creo que te puedria interesar " + document.title;
  mail_str += ". Lo puedes encontrar en: " + location.href;
  location.href = mail_str;
}

var teletextChannel = 'CT1';
var teletextPage = '100';

function updateTeletext()
{
  if (teletextChannel == 'CT1')
  {
    document.images['teletext'].src='http://www.czech-tv.cz/teletext/picture.php?channel=0&page='+teletextPage;
    return;
  }
  if (teletextChannel == 'CT2')
  {
    document.images['teletext'].src='http://www.czech-tv.cz/teletext/picture.php?channel=1&page='+teletextPage;
    return;
  }
  if (teletextChannel == 'Prima')
  {
    document.images['teletext'].src='http://platan.vc.cvut.cz/cgi-bin/httpttx/prima/latest/cp1250/pge320x350/'+teletextPage+'?todo=img320x350';
    return;
  }
  if (teletextChannel == 'CNN')
  {
    document.images['teletext'].src='http://edition.cnn.com/cnntext/resources/images/'+teletextPage+'.gif';
    return;
  }
  if (teletextChannel == 'Shaan')
  {
    document.images['teletext'].src='http://www.datenwerk.co.uk:35101/tiusview/tiusview.png?ch=schaan&page='+teletextPage+'&subpage=01';
    return;
  }
  if (teletextChannel == 'Markiza')
  {
    document.images['teletext'].src='http://www.markizatext.sk/upload/gif/'+teletextPage+'al.gif';
    return;
  }
}

function setTeletextPage(page)
{
  teletextPage = page;
  updateTeletext();
}

function setTeletextChannel(channel)
{
  teletextChannel = channel;
  
// standard
  teletextPage = '100';

// exceptions
  if (teletextChannel == 'Prima')
  {
    teletextPage = '100-01';
  }
  if (teletextChannel == 'CNN')
  {
    teletextPage = '100-01';
  }
  
  document.forms['formular'].pagenumber.value = teletextPage;
  updateTeletext();
}

var http_request = false;
function makeRequest(url, parameters) {
  http_request = false;
  if (window.XMLHttpRequest) { // Mozilla, Safari,...
      http_request = new XMLHttpRequest();
      if (http_request.overrideMimeType) {
        http_request.overrideMimeType('text/xml');
      }
  } else if (window.ActiveXObject) { // IE
      try {
        http_request = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
            http_request = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {}
      }
  }

  if (!http_request) {
      alert('Cannot create XMLHTTP instance');
      return false;
  }

  http_request.onreadystatechange = function() { 
           alertContents(http_request); 
        };
  http_request.open('GET', url + parameters, true);
  http_request.send(null);


  return true;
}

function alertContents(http_request) {
  if (http_request.readyState == 4) {
      if (http_request.status == 200) {
//           alert(http_request.responseText);
      } else {
//           alert('There was a problem with the request.');
      }
  }
}

function do_xml() {
  makeRequest('xml.php', '?test=2');
}

function trackclick(url) {
    if(document.images){ 
        (new Image()).src=url; 
    } 

    //alert(url);
    return true;
}