diff --git a/ChangeLog b/ChangeLog
index ef8139a0d..e2ef64424 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@ $Source$
 
 2002-07-08 Loïc Chapeaux  <lolo@phpheaven.net>
     * tbl_create.php3: Fixed bug #578321 (Wrong page after table creation).
+    * libraries/common.lib.php3: Fixed bug #578404 (js error in no-frame mode).
 
 2002-07-08 Marc Delisle  <lem9@users.sourceforge.net>
     * libraries/display_tbl.lib.php3: bug 577645: extra space in the cell
diff --git a/libraries/common.lib.php3 b/libraries/common.lib.php3
index 77318d5d0..8bab3fd2d 100644
--- a/libraries/common.lib.php3
+++ b/libraries/common.lib.php3
@@ -1126,6 +1126,7 @@ window.parent.frames['nav'].location.replace('<?php echo $reload_url; ?>');
 <script type="text/javascript" language="javascript1.2">
 <!--
 if (typeof(document.getElementById) != 'undefined'
+    && typeof(window.parent.frames['nav']) != 'undefined'
     && typeof(window.parent.frames['nav'].document.getElementById('<?php echo $md5_tbl; ?>')) != 'undefined'
     && typeof(window.parent.frames['nav'].document.getElementById('<?php echo $md5_tbl; ?>').title) == 'string') {
     window.parent.frames['nav'].document.getElementById('<?php echo $md5_tbl; ?>').title = '<?php echo htmlspecialchars($tooltip); ?>';