diff --git a/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js b/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js
index 86bdcd6..c99bfa9 100644
--- a/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js
+++ b/office-alexander-logistics-app/src/main/webapp/js/imixs-office.workitem.custom.js
@@ -6,10 +6,15 @@
  * 
  */
 $(document).ready(function() {
-	/*
-	 * Hier berechnen wir anhand der Eingabe im Feld alexander-logistic-date-days
-     * ein neues Datum auf basis des Rechnungsdatum (date_invoice)
-     */
+	initFaelligkeit();
+
+});
+
+/*
+* Hier setzen wir einen Event handler und berechnen  anhand der Eingabe im Feld alexander-logistic-date-days
+* ein neues Datum auf basis des Rechnungsdatum (date_invoice)
+*/
+function initFaelligkeit(ajax_event) {
 	$(".alexander-logistic-date-days").change(function(e) {
 		var days = $(this).val();
 		if (days=='') {
@@ -56,10 +61,7 @@ $(document).ready(function() {
 		$(this).val('');
 		
 	});
-
-});
-
-
+}
 
 // erweitere datums eingabe
 // TTMM
@@ -102,5 +104,4 @@ function validateBuchungsDatum(item) {
 	// update field....
 	$(mhd).val(text);
 
-
 }
diff --git a/office-alexander-logistics-app/src/main/webapp/pages/workitems/parts/alexander/spaceref.xhtml b/office-alexander-logistics-app/src/main/webapp/pages/workitems/parts/alexander/spaceref.xhtml
index 4e2f50a..aa734c1 100644
--- a/office-alexander-logistics-app/src/main/webapp/pages/workitems/parts/alexander/spaceref.xhtml
+++ b/office-alexander-logistics-app/src/main/webapp/pages/workitems/parts/alexander/spaceref.xhtml
@@ -17,7 +17,7 @@
 					itemValue="#{space.item['$UniqueID']}">
 				</f:selectItem>
 			</c:forEach>
-			<f:ajax render="#{formComponents.clientId}" execute="#{formComponents.clientId}" />
+			<f:ajax render="#{formComponents.clientId}" execute="#{formComponents.clientId}" onevent="initFaelligkeit" />
 		</h:selectOneMenu>
 	</ui:fragment>
 	<ui:fragment rendered="#{readonly}">