diff --git a/UI/WebServerResources/UIxAclEditor.js b/UI/WebServerResources/UIxAclEditor.js
index 5354d9998..8e39832b3 100644
--- a/UI/WebServerResources/UIxAclEditor.js
+++ b/UI/WebServerResources/UIxAclEditor.js
@@ -53,7 +53,7 @@ function saveAcls() {
 function onUserAdd(event) {
    openUserFolderSelector(null, "user");
 
-   event.preventDefault();
+   preventDefault(event);
 }
 
 function removeUserCallback(http) {
@@ -79,7 +79,7 @@ function onUserRemove(event) {
       var userId = nodes[i].getAttribute("id");
       triggerAjaxRequest(baseURL + userId, removeUserCallback, nodes[i]);
    }
-   event.preventDefault();
+   preventDefault(event);
 }
 
 function subscribeToFolder(refreshCallback, refreshCallbackData) {
@@ -109,12 +109,12 @@ function openRightsForUser(button) {
 
 function openRightsForDefaultUser(event) {
    openRightsForUserID(defaultUserID);
-   event.preventDefault();
+   preventDefault(event);
 }
 
 function onOpenUserRights(event) {
    openRightsForUser();
-   event.preventDefault();
+   preventDefault(event);
 }
 
 function onAclLoadHandler() {
diff --git a/UI/WebServerResources/UIxAttendeesEditor.js b/UI/WebServerResources/UIxAttendeesEditor.js
index ea67f8e2f..1fe1004b0 100644
--- a/UI/WebServerResources/UIxAttendeesEditor.js
+++ b/UI/WebServerResources/UIxAttendeesEditor.js
@@ -15,7 +15,7 @@ var attendeesEmails;
 
 function onContactKeydown(event) {
   if (event.keyCode == 9) {
-    event.preventDefault();
+    preventDefault(event);
     if (this.confirmedValue)
       this.value = this.confirmedValue;
     var row = this.parentNode.parentNode.nextSibling;
@@ -333,7 +333,7 @@ function initializeWindowButtons() {
 }
 
 function onEditorOkClick(event) {
-   event.preventDefault();
+   preventDefault(event);
 
    attendeesNames = new Array();
    attendeesEmails = new Array();
@@ -363,7 +363,7 @@ function onEditorOkClick(event) {
 }
 
 function onEditorCancelClick(event) {
-   event.preventDefault();
+   preventDefault(event);
    window.close();
 }
 
diff --git a/UI/WebServerResources/UIxComponentEditor.js b/UI/WebServerResources/UIxComponentEditor.js
index c14f0f191..47a0d619a 100644
--- a/UI/WebServerResources/UIxComponentEditor.js
+++ b/UI/WebServerResources/UIxComponentEditor.js
@@ -43,7 +43,7 @@ function onPopupUrlWindow(event) {
 function onPopupDocumentWindow(event) {
    var documentUrl = $("url");
 
-   event.preventDefault();
+   preventDefault(event);
    window.open(documentUrl.value, "SOGo_Document");
 
    return false;
diff --git a/UI/WebServerResources/UIxContactsUserFolders.js b/UI/WebServerResources/UIxContactsUserFolders.js
index d5b527a16..2755a613f 100644
--- a/UI/WebServerResources/UIxContactsUserFolders.js
+++ b/UI/WebServerResources/UIxContactsUserFolders.js
@@ -78,7 +78,7 @@ function buildTree(response) {
 }
 
 function onFolderTreeItemClick(event) {
-   event.preventDefault();
+   preventDefault(event);
 
    var topNode = $("d");
    if (topNode.selectedEntry)