diff --git a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/utils/UtilsGXT3.java b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/utils/UtilsGXT3.java
index b34020d..c9727cb 100644
--- a/src/main/java/org/gcube/portlets/user/td/columnwidget/client/utils/UtilsGXT3.java
+++ b/src/main/java/org/gcube/portlets/user/td/columnwidget/client/utils/UtilsGXT3.java
@@ -1,16 +1,18 @@
 package org.gcube.portlets.user.td.columnwidget.client.utils;
 
+import com.google.gwt.core.client.Callback;
 import com.google.gwt.user.client.Element;
 import com.sencha.gxt.core.client.dom.XElement;
+import com.sencha.gxt.widget.core.client.Component;
 import com.sencha.gxt.widget.core.client.box.AlertMessageBox;
 import com.sencha.gxt.widget.core.client.event.HideEvent;
 import com.sencha.gxt.widget.core.client.event.HideEvent.HideHandler;
 
 /**
  * 
- * @author "Giancarlo Panichi" 
- * <a href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a> 
- *
+ * @author "Giancarlo Panichi" <a
+ *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
+ * 
  */
 public class UtilsGXT3 {
 	public static void mask(Element element) {
@@ -21,8 +23,7 @@ public class UtilsGXT3 {
 	public static void umask(Element element) {
 		element.<XElement> cast().unmask();
 	}
-	
-	
+
 	public static void alert(String title, String message) {
 		final AlertMessageBox d = new AlertMessageBox(title, message);
 		d.addHideHandler(new HideHandler() {
@@ -34,7 +35,20 @@ public class UtilsGXT3 {
 		d.show();
 
 	}
-	
+
+	public static void alert(String title, String message,
+			final Callback<Component, Void> callback) {
+		final AlertMessageBox d = new AlertMessageBox(title, message);
+		d.addHideHandler(new HideHandler() {
+
+			public void onHide(HideEvent event) {
+				Component comp = event.getSource();
+				callback.onSuccess(comp);
+			}
+		});
+		d.show();
+	}
+
 	public static void info(String title, String message) {
 		final InfoMessageBox d = new InfoMessageBox(title, message);
 		d.addHideHandler(new HideHandler() {
@@ -46,5 +60,19 @@ public class UtilsGXT3 {
 		d.show();
 
 	}
-	
+
+	public static void info(String title, String message,
+			final Callback<Component, Void> callback) {
+		final InfoMessageBox d = new InfoMessageBox(title, message);
+		d.addHideHandler(new HideHandler() {
+
+			public void onHide(HideEvent event) {
+				Component comp = event.getSource();
+				callback.onSuccess(comp);
+			}
+		});
+		d.show();
+
+	}
+
 }