Index: footer.inc.php
===================================================================
--- footer.inc.php	(revision 87)
+++ footer.inc.php	(working copy)
@@ -63,7 +63,9 @@
 
 // reset content frame name, as querywindow needs to set a unique name
 // before submitting form data, and navigation frame needs the original name
-window.parent.frames[1].name = 'frame_content';
+if (window.parent.frames[1].name != 'frame_content') {
+    window.parent.frames[1].name = 'frame_content';
+}
 //]]>
 </script>
 <?php