function getData(dataSource)
{ 
  var objXMLHttpRequest = false; 

  if (window.XMLHttpRequest) {
    objXMLHttpRequest = new XMLHttpRequest();

  } else if (window.ActiveXObject) {
    objXMLHttpRequest = new 
      ActiveXObject("Microsoft.XMLHTTP");
  }

  if(objXMLHttpRequest) {
    objXMLHttpRequest.open("GET", dataSource); 

    objXMLHttpRequest.onreadystatechange = function() 
    { 
      if (objXMLHttpRequest.readyState == 4 && 
        objXMLHttpRequest.status == 200) { 
          document.getElementById("info-kasten").innerHTML = objXMLHttpRequest.responseText; 

          delete objXMLHttpRequest;
          objXMLHttpRequest = null;
      } 
    } 

    objXMLHttpRequest.send(null); 
  }
}