var conAktuell, conVita, conAusstellungen, conKontakt, conLinks;
var request;
var bodyonload = 0;
var contentonload = 0;

// Request erzeugen
if (window.XMLHttpRequest) {
	request = new XMLHttpRequest(); // Mozilla, Safari, Opera
} else if (window.ActiveXObject) {
	try {
	  request = new ActiveXObject('Msxml2.XMLHTTP'); // IE 5
	} catch (e) {
	  try {
		  request = new ActiveXObject('Microsoft.XMLHTTP'); // IE 6
	  } catch (e) {}
	  }
  }

    // überprüfen, ob Request erzeugt wurde
if (!request) {
} else {
	var url = "content.xml";
	// Request öffnen
	request.open('post', url, true);
	// Requestheader senden
	request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	// Request senden
	request.send();
	// Request auswerten
	request.onreadystatechange = function() {
	  switch (request.readyState) {
		// wenn der readyState 4 und der request.status 200 ist, dann ist alles korrekt gelaufen
	    case 4:
	      if (request.status != 200) {
      	} else {
  		    var xmlDoc = request.responseXML;
  		    var site = xmlDoc.getElementsByTagName('site');
  		    var title, content;
  
  		    for (var i = 0; i <= site.length - 1; i++) {  
      			title = site[i].getAttribute("title");
      			content = site[i].getAttribute("content");

            switch (title) {
              case "aktuell":
                conAktuell = content;
                break;
              case "vita":
                conVita = content;
                break;
              case "ausstellungen":
                conAusstellungen = content;
                break;
              case "kontakt":
                conKontakt = content;
                break;
              case "links":
                conLinks = content;
                break;
              }
  		      } 
  		    contentonload = 1;  
  		    
  		    if(bodyonload==1)
  		      changeContent('aktuell');
		      }
		    break;
	    default:
	   	  break;
	    }

	  };
  }