diff --git a/addthis.admin.inc b/addthis.admin.inc
index f60ab4822e6060c82df7e4f53ff5ddee5afa30a7..f963208f75f452ac1357b3b6722d93fba6819db7 100644
--- a/addthis.admin.inc
+++ b/addthis.admin.inc
@@ -68,13 +68,18 @@ function addthis_admin_settings() {
     '#default_value' => variable_get('addthis_image_height', '16'),
     '#description'   => t('Height for button image. Example: 16'),
   );
-  $form['addthis_button_settings']['addthis_image_attributes'] = array(
+  $form['addthis_button_settings']['addthis_image_attributes_alt'] = array(
     '#type'          => 'textfield',
-    '#title'         => t('Button image HTML attributes'),
-    '#default_value' => variable_get('addthis_image_attributes', 'alt=""'),
-    '#description'   => t('Extra HTML attributes for img tag. Example: alt=""'),
+    '#title'         => t('Button image Alt tag'),
+    '#default_value' => variable_get('addthis_image_attributes_alt', 'share'),
+    '#description'   => t('Text for Alt tag in img tag. Default: share'),
+  );
+  $form['addthis_button_settings']['addthis_image_attributes_class'] = array(
+    '#type'          => 'textfield',
+    '#title'         => t('Button image Class tag'),
+    '#default_value' => variable_get('addthis_image_attributes_class', 'addthisimage'),
+    '#description'   => t('Text for CSS class in img tag. Default: addthisimage'),
   );
-
   $form['addthis_widget_settings'] = array(
     '#type'         => 'fieldset',
     '#title'        => t('Widget settings'),
diff --git a/addthis.module b/addthis.module
index 31e32f09d5459b791ea3ebb3e7311546bea263ae..24866b64bf48280a3fb71abee262fc49a37668db 100644
--- a/addthis.module
+++ b/addthis.module
@@ -161,11 +161,12 @@ function theme_addthis_button($node, $teaser) {
     $button = sprintf('
       <a class="addthis-button" href="http://www.addthis.com/bookmark.php"
         onclick="addthis_url   = location.href; addthis_title = document.title; return addthis_click(this);">
-      <img src="%s" width="%d" height="%d" %s /></a>',
+      <img src="%s" width="%d" height="%d" alt="%s" class="%s" /></a>',
       $_SERVER['HTTPS'] == 'on' ? addslashes(check_plain(variable_get('addthis_image_secure', 'https://secure.addthis.com/button1-share.gif'))) : addslashes(check_plain(variable_get('addthis_image', 'http://s9.addthis.com/button1-share.gif'))),
       variable_get('addthis_image_width', '125'),
       variable_get('addthis_image_height', '16'),
-      addslashes(filter_xss(variable_get('addthis_image_attributes', 'alt=""')))
+      trim(check_plain(strip_tags(variable_get('addthis_image_attributes_alt', 'share')))),
+      trim(check_plain(strip_tags(variable_get('addthis_image_attributes_class', 'addthisimage'))))
     );
   }
   else {
@@ -173,13 +174,14 @@ function theme_addthis_button($node, $teaser) {
       <a class="addthis-button" href="http://www.addthis.com/bookmark.php"
         onmouseover="return addthis_open(this, \'\', \'%s\', \'%s\')"
         onmouseout="addthis_close()"
-        onclick="return addthis_sendto()"><img src="%s" width="%d" height="%d" %s /></a>',
+        onclick="return addthis_sendto()"><img src="%s" width="%d" height="%d" alt="%s" class="%s" /></a>',
       $teaser ? url('node/'. $node->nid, array('absolute' => 1) ) : '[URL]',
       $teaser ? addslashes($node->title) : '[TITLE]',
       $_SERVER['HTTPS'] == 'on' ? addslashes(check_plain(variable_get('addthis_image_secure', 'https://secure.addthis.com/button1-share.gif'))) : addslashes(check_plain(variable_get('addthis_image', 'http://s9.addthis.com/button1-share.gif'))),
       variable_get('addthis_image_width', '125'),
       variable_get('addthis_image_height', '16'),
-      check_plain(variable_get('addthis_image_attributes', 'alt=""'))
+      trim(check_plain(strip_tags(variable_get('addthis_image_attributes_alt', 'share')))),
+      trim(check_plain(strip_tags(variable_get('addthis_image_attributes_class', 'addthisimage'))))
     );
     if ($_addthis_counter == 1) {
       $button .= sprintf('<script type="text/javascript" src="%s/js/%d/addthis_widget.js">',