Please provide a "hook" in uberpos_screen_ajax_success

Would it be possible to create a "hook" in uberpos_screen_ajax_succes to allow external modules to do some processing in JavaScript when the ajax call completes?

For example, would something like this be possible, or is there another way?

--- js/uberpos.js	(revision 1090)
+++ js/uberpos.js	(working copy)
@@ -3,6 +3,19 @@
 Drupal.Uberpos.rowsPerScreen = 0;
 Drupal.Uberpos.firstPass = true;
 
+// "hooks" for use in uberpos_screen_ajax_success
+if(! Drupal.Uberpos ){
+  Drupal.Uberpos = new Object();
+}
+if(! Drupal.Uberpos.ajax ){
+  Drupal.Uberpos.ajax = new Object();
+}
+if(!  Drupal.Uberpos.ajax.jsonpostprocesshook ) {
+  Drupal.Uberpos.ajax.jsonpostprocesshook = [];
+};
+if(!  Drupal.Uberpos.ajax.callcompletehook ) {
+  Drupal.Uberpos.ajax.callcompletehook = [];
+}
 /*****************************************************************************
  * Interface setup
  *****************************************************************************/
@@ -300,6 +313,13 @@
    * Includes products, line items, customer name. */
   var result = Drupal.parseJson(data);
 
+  // json post processing hook
+  if(Drupal.Uberpos.ajax.jsonpostprocesshook) {
+    jQuery.each(Drupal.Uberpos.ajax.jsonpostprocesshook, function(i, postprocesshook){
+        postprocesshook.call(this, result);
+      });
+  };
+
   Drupal.settings.uberpos.order_id = result['order_id'];
 
   if(result['redirect']) {
@@ -351,6 +371,15 @@
 
     $("input#edit-pos-input").focus();
   }
+
+
+  // ajax call completion hook
+  if(Drupal.Uberpos.ajax.callcompletehook) {
+    jQuery.each(Drupal.Uberpos.ajax.callcompletehook, function(i, callcompletehook){
+        callcompletehook.call(this, result);
+      });
+  };
+
 }
 
 /**
@@ -366,5 +395,4 @@
 function hide_uberpos_throbber() {
   $('#uberpos-div-throbber').removeAttr('style').empty();
 }
-
-
+;