diff --git a/install.php b/install.php
index 4ade6b5..d2a4b14 100644
--- a/install.php
+++ b/install.php
@@ -490,17 +490,17 @@ $convert_favicons = ' . $convert_favicons . ';
 $convert = \'' . $convert . '\';
 $identify = \'' . $identify . '\';
 $timeout = 5;
-$folder_closed = \'<img src="./images/folder.gif">\';
-$folder_opened = \'<img src="./images/folder_open.gif">\';
-$folder_closed_public = \'<img src="./images/folder_red.gif">\';
-$folder_opened_public = \'<img src="./images/folder_open_red.gif">\';
-$bookmark_image = \'<img src="./images/bookmark_image.gif">\';
-$plus = \'<img src="./images/plus.gif"> \';
-$minus = \'<img src="./images/minus.gif"> \';
-$neutral = \'<img src="./images/spacer.gif" width="13" height="1"> \';
-$edit_image = \'<img src="./images/edit.gif" title="%s">\';
-$move_image = \'<img src="./images/move.gif" title="%s">\';
-$delete_image = \'<img src="./images/delete.gif" title="%s">\';
+$folder_closed = \'<img src="./images/folder.gif" alt="">\';
+$folder_opened = \'<img src="./images/folder_open.gif" alt="">\';
+$folder_closed_public = \'<img src="./images/folder_red.gif" alt="">\';
+$folder_opened_public = \'<img src="./images/folder_open_red.gif" alt="">\';
+$bookmark_image = \'<img src="./images/bookmark_image.gif" alt="">\';
+$plus = \'<img src="./images/plus.gif" alt=""> \';
+$minus = \'<img src="./images/minus.gif" alt=""> \';
+$neutral = \'<img src="./images/spacer.gif" width="13" height="1" alt=""> \';
+$edit_image = \'<img src="./images/edit.gif" title="%s" alt="">\';
+$move_image = \'<img src="./images/move.gif" title="%s" alt="">\';
+$delete_image = \'<img src="./images/delete.gif" title="%s" alt="">\';
 $delimiter = "/";
 ?>';