diff --git a/homebox-block.tpl.php b/homebox-block.tpl.php
index 11876be..9b523f0 100644
--- a/homebox-block.tpl.php
+++ b/homebox-block.tpl.php
@@ -10,12 +10,12 @@
   <div class="homebox-portlet-inner">
     <h3 class="portlet-header">
       <?php if ($block->closable): ?>
-        <a class="portlet-icon portlet-close"></a>
+        <a class="portlet-icon portlet-close"><button class="element-invisible">Close</span></button>
       <?php endif; ?>
-      <a class="portlet-icon portlet-maximize"></a>
-      <a class="portlet-icon portlet-minus"></a>
+      <button class="portlet-icon portlet-maximize" class="element-invisible"><span class="element-invisible">Maximize</span></button>
+      <button class="portlet-icon portlet-minus" class="element-invisible"><span class="element-invisible">Minimize</span></button>
       <?php if ($page->settings['color'] || isset($block->edit_form)): ?>
-        <a class="portlet-icon portlet-settings"></a>
+        <button class="portlet-icon portlet-settings"><span class="element-invisible">class="element-invisible">Settings</span></button>
       <?php endif; ?>
       <span class="portlet-title"><?php print $block->subject ?></span>
     </h3>