diff --git a/public/images/loading-overlay.gif b/public/images/loading-overlay.gif
new file mode 100644
index 0000000..e71258e
Binary files /dev/null and b/public/images/loading-overlay.gif differ
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 3206d8d..0270a84 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -21,6 +21,7 @@
 * noosfero libraries
 *= require_self
 *= require modal.js
+*= require loading-overlay.js
 * views speficics
 *= require add-and-join.js
 *= require report-abuse.js
diff --git a/public/javascripts/loading-overlay.js b/public/javascripts/loading-overlay.js
new file mode 100644
index 0000000..0d90f7e
--- /dev/null
+++ b/public/javascripts/loading-overlay.js
@@ -0,0 +1,36 @@
+if (typeof loading_overlay === 'undefined') {
+
+// block user actions while making a post. Also indicate the network transaction
+loading_overlay = {
+
+  show: function (selector) {
+    var element = jQuery(selector);
+    if (element.length > 0) {
+      var overlay = jQuery('<div>', {
+        class: 'loading-overlay',
+        css: {
+          width: element.outerWidth(),
+          height: element.outerHeight(),
+          left: element.position().left,
+          top: element.position().top,
+          marginLeft: parseFloat(element.css('margin-left')),
+          marginTop: parseFloat(element.css('margin-top')),
+          marginRight: parseFloat(element.css('margin-right')),
+          marginBottom: parseFloat(element.css('margin-bottom')),
+        },
+      }).appendTo(element).get(0);
+
+      overlay.dest = element;
+      element.loading_overlay = overlay;
+    }
+  },
+
+  hide: function (selector) {
+    var element = jQuery(selector);
+    var overlay = element.find('.loading-overlay');
+    overlay.remove();
+  },
+
+};
+
+}
diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 89d9a67..9f5205c 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -11,6 +11,7 @@
  * noosfero libraries
  *= require_self
  *= require iepngfix/iepngfix
+ *= require loading-overlay
  * views specifics
  *= require chat
  *= require search
diff --git a/public/stylesheets/loading-overlay.scss b/public/stylesheets/loading-overlay.scss
new file mode 100644
index 0000000..b7f93ad
--- /dev/null
+++ b/public/stylesheets/loading-overlay.scss
@@ -0,0 +1,8 @@
+
+.loading-overlay {
+  position: absolute;
+  background-color: #eee; /* while the image don't load */
+  background-image: url(/images/loading-overlay.gif);
+  opacity: 0.40;
+  z-index: 10;
+}
--
libgit2 0.21.2