if( typeof XMLHttpRequest == "undefined" ) XMLHttpRequest = function() {
  try { return new ActiveXObject("Msxml2.XMLHTTP.6.0") } catch(e) {}
  try { return new ActiveXObject("Msxml2.XMLHTTP.3.0") } catch(e) {}
  try { return new ActiveXObject("Msxml2.XMLHTTP") } catch(e) {}
  try { return new ActiveXObject("Microsoft.XMLHTTP") } catch(e) {}
  throw new Error( "This browser does not support XMLHttpRequest." )
};

function extend2()
{
//alert (document.getElementById('form_dorucovaci_tady').style.display);
if (document.getElementById('form_dorucovaci_tady').style.display != 'block') 
  document.getElementById('form_dorucovaci_tady').style.display = 'block'; 
else 
  document.getElementById('form_dorucovaci_tady').style.display = 'none'; 
}

function extend3()
{
//alert (document.getElementById('form_dorucovaci_tady').style.display);
if (document.getElementById('form_osobafirma_tady').style.display != 'block') 
  document.getElementById('form_osobafirma_tady').style.display = 'block'; 
else 
  document.getElementById('form_osobafirma_tady').style.display = 'none'; 
}

function extend_serch()
{
//alert (document.getElementById('form_dorucovaci_tady').style.display);
if (document.getElementById('okno_vyhledavani').style.display != 'block') 
  document.getElementById('okno_vyhledavani').style.display = 'block'; 
else 
  document.getElementById('okno_vyhledavani').style.display = 'none'; 
}

function extend_form()
{
  try {
    var http_request = new XMLHttpRequest();
    http_request.open('GET', "ajax/form_dorucovaci.php", true);
    http_request.onreadystatechange = function() {
                                                  if (http_request.readyState == 4)
                                                  {
                                                    if (http_request.status == 200){
                                                      var text = http_request.responseText;
                                                      text = text.replace(/none/g,"block");
                                                      document.getElementById('form_dorucovaci_tady').innerHTML += text;
                                                    }else{
                                                      alert("Chyba pri nacitani stanky"+ http_request.status +":"+ http_request.statusText);
                                                      alert("error "+http_request.status);
                                                    }
                                                   }
                                                   };
    http_request.setRequestHeader("Content-Type", "text/html; charset=windows-1250")
    http_request.send(null);
  } catch (e) {
    alert(e.message);
  }
}

function button_on(id)
    {
    document.getElementById(id).style.backgroundColor ='#dbdbdb';   
    }
function button_off(id)
    {
    document.getElementById(id).style.backgroundColor ='';
    }
    

function button_on_frontpage(id)
    {
    document.getElementById(id).style.backgroundColor ='#aaaaaa';
    document.getElementById(id).style.color ='#ffffff';    
    }
function button_off_frontpage(id)
    {
    document.getElementById(id).style.backgroundColor ='#d7d7d7';
    document.getElementById(id).style.color ='#555555';
    }