diff --git a/homebox.js b/homebox.js
index 2ef2977..7b30afd 100644
--- a/homebox.js
+++ b/homebox.js
@@ -26,18 +26,18 @@ Drupal.behaviors.homebox = function(context) {
     $boxes = $homebox.find('.homebox-portlet');
     $boxes.find('.portlet-config').each(function() {
       if (jQuery.trim($(this).html()) != '') {
-        $(this).prev('.portlet-header').prepend('<span class="portlet-icon portlet-settings"></span>').end();
+        $(this).prev('.portlet-header').prepend('<span class="portlet-icon portlet-settings" role="link" class="element-invisible">Settings</span>').end();
       };
     });
     $boxes.find('.portlet-header').prepend('<span class="portlet-icon portlet-minus"></span>')
-        .prepend('<span class="portlet-icon portlet-close"></span>')
+        .prepend('<span class="portlet-icon portlet-close" role="link" class="element-invisible">Close</span>')
         .end();
         
     // Remove close tool for unclosable blocks
     $homebox.find('.homebox-unclosable span.portlet-close').remove();
     
     // Add maximize link to every portlet
-    $boxes.find('.portlet-header .portlet-close').after('<span class="portlet-icon portlet-maximize"></span>');
+    $boxes.find('.portlet-header .portlet-close').after('<span class="portlet-icon portlet-maximize" role="link" class="element-invisible">Maximize</span>');
     
     // Attach click event to maximize icon
     $boxes.find('.portlet-header .portlet-maximize').click(function() {