* if we got no data from the server in the haltestelle.processabfahrten() method, we call haltestelle.getHaltestellen() method
* when we got data from the server in the haltestelle.getHaltestellen() method, we call the haltestelle.processHaltestellen() method
* in the haltestelle.processHaltestellen() method we process the gotten data and print it into the output area of the html file

* method viewkeys() not available in python2.6
* instead we iterate now with simple for-loop over queries dict

* now a for loop, where we iterate over the keys of the queries dict
* when a key is found in the form queries, we set it to the form value

* new query: query which contains the wished server script to call
* query can contain 'haltestelle.do' or 'abfahrten.do'
* all other values are rejected and answered with empty array

* new method haltestelle.getHaltestellen() to get the station names from the server
* new method haltestelle.processHaltestellen() to process the received station names
* event handler registration for haltestelle.getHaltestellen() method

* combined various variable defintions
* moved the invocation into the parens that contain the function
* some minor things

* dependent on the window.location.protocol result, we construct the serverUrl
* for strato ssl-proxy, we hve to insert the 1st part of the window.location.path result

* rename 'haltestelle.getInfo()' method to 'haltestelle.getAbfahrten()'
* move the ajax response processing from the anonymous callback function in the'haltestelle.getAbfahrten()' method into own 'haltestelle.processAbfahrten()' method
* adapt the eventListener to the renaming into the 'haltestelle.getAbfahrten()' method

* if it's empty don't process it and print a message into html
* if there is useful data, process is and print the data as table into html

* check for the origin of the url (with or without www) to select the suitable ajax url to fullfill the same origin policy

* creating an sequence of two-element tuples with the queries gotten from the ajax calling instance
* use that sequence of tuples with the urlencode() method to create the encoded string of queries

* we get a request from the ajax function in the javascript
* we parse the queries of the request
* we send a request with the parsed queries to the vvo server
* we get the data from the vvo server
* we send the data to the requesting ajax function

* we get our data now from a python script on same server as the webpage
* url was changed to our own server
* we must delete one char more at begin and end of the response string

* ajaxCall() function now with parameter for type of response value, available values: "text", "xml" & "json"

some more comments for documentation