https://www.heskon.de/js/billink/billink_payment_form_session.js?v1.6.8

1/**
2 * Store the billink payment form to session on change
3 */
4;billink.paymentFormSession = new function()
5{
6    var self = this;
7    self.setPaymentFormFieldsUrl = '';
8    self.getPaymentFormFieldsUrl = '';
9    self.formController = null;
10
11    /**
12     * Attach listeners
13     */
14    self.init = function(setPaymentFormFieldsUrl, getPaymentFormFieldsUrl, formController)
15    {
16        self.setPaymentFormFieldsUrl = setPaymentFormFieldsUrl;
17        self.getPaymentFormFieldsUrl = getPaymentFormFieldsUrl;
18        self.formController = formController;
19
20        // if the form changes, post it to server for session storage
21        $$("#payment_form_billink input").invoke('observe', 'change', function() {
22            self.savePaymentFormFieldsInSession();
23        });
24    };
25
26    /**
27     * Save fields in session
28     */
29    self.savePaymentFormFieldsInSession = function(){
30        var values = {};
31
32        //grab text fields
33        $$("#payment_form_billink input").each(function(element) {
34            values[element.name] = element.getValue();
35        });
36
37        //Grab dropdowns
38        $$("#payment_form_billink select").each(function(element) {
39            values[element.name] = element.getValue();
40        });
41
42        //grab selected radio fields
43        $$("#payment_form_billink input:checked").each(function(element) {
44            values[element.name] = element.getValue();
45        });
46
47        new Ajax.Request(self.setPaymentFormFieldsUrl, {
48            method : 'post',
49            parameters : values
50        });
51    };
52};