diff --git a/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/InfoMessageBox.java b/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/InfoMessageBox.java
index d8c9b79..46577e6 100644
--- a/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/InfoMessageBox.java
+++ b/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/InfoMessageBox.java
@@ -2,6 +2,12 @@ package org.gcube.portlets.user.td.sharewidget.client.util;
 
 import com.sencha.gxt.widget.core.client.box.MessageBox;
 
+/**
+ * 
+ * @author "Giancarlo Panichi" 
+ * <a href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a> 
+ *
+ */
 public class InfoMessageBox extends MessageBox {
 
 	/**
diff --git a/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/UtilsGXT3.java b/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/UtilsGXT3.java
new file mode 100644
index 0000000..727cd34
--- /dev/null
+++ b/src/main/java/org/gcube/portlets/user/td/sharewidget/client/util/UtilsGXT3.java
@@ -0,0 +1,78 @@
+package org.gcube.portlets.user.td.sharewidget.client.util;
+
+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>
+ * 
+ */
+public class UtilsGXT3 {
+	public static void mask(Element element) {
+		XElement el = element.<XElement> cast();
+		el.mask("Loading...");
+	}
+
+	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() {
+
+			public void onHide(HideEvent event) {
+
+			}
+		});
+		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() {
+
+			public void onHide(HideEvent event) {
+
+			}
+		});
+		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();
+
+	}
+
+}