Index: typo3/js/workspacemenu.js
===================================================================
--- typo3/js/workspacemenu.js	(revision 8480)
+++ typo3/js/workspacemenu.js	(working copy)
@@ -110,6 +110,8 @@
 	 * toggles the workspace frontend preview
 	 */
 	toggleFrontendPreview: function(event) {
+		var clickedElement = Event.element(event);
+
 		var toggle = new Ajax.Request('ajax.php', {
 			parameters: 'ajaxID=WorkspaceMenu::toggleWorkspacePreview',
 			onSuccess: function(transport, response) {
@@ -118,11 +120,11 @@
 
 				if (response.newWorkspacePreviewState === '1') {
 					TYPO3.configuration.workspaceFrontendPreviewEnabled = 1;
-					Event.element(event).previous().removeClassName(stateInactiveClass).addClassName(stateActiveClass);
+					clickedElement.previous().removeClassName(stateInactiveClass).addClassName(stateActiveClass);
 					top.WorkspaceFrontendPreviewEnabled = true;
 				} else {
 					TYPO3.configuration.workspaceFrontendPreviewEnabled = 0;
-					Event.element(event).previous().removeClassName(stateActiveClass).addClassName(stateInactiveClass);
+					clickedElement.previous().removeClassName(stateActiveClass).addClassName(stateInactiveClass);
 					top.WorkspaceFrontendPreviewEnabled = false;
 				}
 			}
@@ -144,7 +146,8 @@
 	 * switches the workspace, reloads the module menu, and the content frame
 	 */
 	switchWorkspace: function(event) {
-		var workspaceId = Event.element(event).identify().substring(3);
+		var clickedElement = Event.element(event);
+		var workspaceId = clickedElement.identify().substring(3);
 
 		var switchRequest = new Ajax.Request('ajax.php', {
 			parameters: 'ajaxID=WorkspaceMenu::setWorkspace&workspaceId=' + workspaceId,
@@ -160,8 +163,8 @@
 				$$('#workspace-selector-menu li.selected')[0].removeClassName('selected');
 
 					// add "selected" class and checkmark
-				Event.element(event).previous().removeClassName(stateInactiveClass).addClassName(stateActiveClass);
-				Event.element(event).up().addClassName('selected');
+				clickedElement.previous().removeClassName(stateInactiveClass).addClassName(stateActiveClass);
+				clickedElement.up().addClassName('selected');
 
 					// when in web module reload, otherwise send the user to the web module
 				if (currentModuleLoaded.startsWith('web_')) {