function Koktejly(url) {
var http_request = false;

if (window.XMLHttpRequest) { http_request = new XMLHttpRequest(); // FF, Mozilla, Opera
  if (http_request.overrideMimeType) { http_request.overrideMimeType('text/xml'); }
  } //konec FF
  else if (window.ActiveXObject) { // IE
   try { http_request = new ActiveXObject("Msxml2.XMLHTTP"); } 
    catch (e) {
        try { http_request = new ActiveXObject("Microsoft.XMLHTTP"); } 
          catch (e) {}
            }
        } //konec IE

  if (!http_request) { alert('Chyba při zobrazení koktejlu.'); return false; }
        http_request.onreadystatechange = function() { ukaz(http_request);  };
        http_request.open('GET', url, true);
        http_request.send(null);

    }

function ukaz(http_request) {
 if (http_request.readyState == 4) {
    if (http_request.status == 200) {
    var kde = document.getElementById("ukaz-koktejl");
    kde.innerHTML = http_request.responseText;
    } 
  else { alert('Chyba při zobrazení koktejlu.'); }
        }
}