diff --git a/scripts/haltestellen.js b/scripts/haltestellen.js
index 18a389f..cc7d817 100644
--- a/scripts/haltestellen.js
+++ b/scripts/haltestellen.js
@@ -3,64 +3,6 @@
 var DEBUG;
 
 
-// xmlhttp object function
-function getHTTPObject() {
-
-    // debug log
-    if (DEBUG === 1) {console.log("xml http object function");}
-
-    // variable definitions
-    var xhr;
-
-    // check for availibility if xmlhttprequest object
-    if(window.XMLHttpRequest) {
-        xhr = new XMLHttpRequest();
-    } else if(window.ActiveXObject) {
-        xhr = new ActiveXObject("Msxml2.XMLHTTP");
-    }
-
-    return xhr;
-
-}
-
-
-// ajax call function
-function ajaxCall(dataUrl, outputElement, callback, responseType) {
-
-    // debug log
-    if (DEBUG === 1) {console.log("ajax function");}
-
-    // variable definitions
-    var response,
-        request = getHTTPObject();  // get the xmlhttp object which is supported
-
-    outputElement.innerHTML = "Lade Daten ...";
-
-    request.onreadystatechange = function() {
-
-        if(request.readyState === 4 && request.status === 200) {
-
-            //save ajax response
-            if (responseType === "json") {
-                response = JSON.parse(request.responseText);
-            } else if (responseType === "xml") {
-                response = request.responseXML;
-            } else {
-                response = request.responseText;
-            }
-
-            // check if callback is a function
-            if(typeof callback === "function") {
-                callback(response);
-            }
-        }
-    };
-
-    request.open("get", dataUrl, true);
-    request.send(null);
-
-}
-
 
 // wrap all in anonymous function to get out of global scope
 (function() {
@@ -102,7 +44,7 @@ function ajaxCall(dataUrl, outputElement, callback, responseType) {
                 hstUrl  = encodeURI(serverUrl + "abfahrtsmonitor.py?query=abfahrten.do&ort=dresden&hst=" + hstName);
 
             // get the data from the server with an ajax call
-            ajaxCall(hstUrl, target, haltestelle.processAbfahrten, "text");
+            gcf.ajaxCall(hstUrl, target, this.processAbfahrten, "text");
 
         },
 
@@ -188,7 +130,7 @@ function ajaxCall(dataUrl, outputElement, callback, responseType) {
                 hstUrl  = encodeURI(serverUrl + "abfahrtsmonitor.py?query=haltestelle.do&ort=dresden&hst=" + hstName);
 
             // get the data from the server with an ajax call
-            ajaxCall(hstUrl, target, haltestelle.processHaltestellen, "text");
+            gcf.ajaxCall(hstUrl, target, this.processHaltestellen, "text");
 
         },