--- a/flys-client/src/main/java/de/intevation/flys/client/client/ui/MainMenu.java	Tue Oct 23 09:57:42 2012 +0200
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/ui/MainMenu.java	Tue Oct 23 09:59:16 2012 +0200
@@ -3,6 +3,7 @@
 import com.google.gwt.core.client.GWT;
 import com.google.gwt.i18n.client.LocaleInfo;
 import com.google.gwt.user.client.Window;
+import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.smartgwt.client.types.Alignment;
 import com.smartgwt.client.util.BooleanCallback;
 import com.smartgwt.client.util.SC;
@@ -14,6 +15,8 @@
 
 import de.intevation.flys.client.client.FLYS;
 import de.intevation.flys.client.client.FLYSConstants;
+import de.intevation.flys.client.client.services.UserService;
+import de.intevation.flys.client.client.services.UserServiceAsync;
 import de.intevation.flys.client.shared.model.User;
 
 
@@ -49,6 +52,9 @@
     /** The button to open an info panel.*/
     protected Button info;
 
+    protected UserServiceAsync userService =
+        GWT.create(UserService.class);
+
     /**
      * The default constructor for creating a new MainMenu.
      */
@@ -88,7 +94,15 @@
             @Override
             public void onClick(ClickEvent event) {
                 GWT.log("Clicked 'logout' button.");
-                GWT.log("IMPLEMENT the 'logout' function.");
+                userService.logoutCurrentUser(new AsyncCallback<Void>() {
+                    public void onFailure(Throwable caught) {
+                    }
+
+                    public void onSuccess(Void result) {
+                        Window.Location.replace("/login.jsp");
+                    }
+                });
+
             }
         });