1. please follow Rouslan's suggestions; however, the variable, after the
split, really contains a span id (to find the other footnote span)

2. please add a comment just before the line containing the split,
explaining that this variable contains two classes at this point (for
example "footnotemarker footnote_1_1")

3. also add a comment, using for example footnote_2_3 and that after the
split, the variable contains 2, so will find the footnote #2

I did the above changes and pushed to the repo.

I find it a bit hazardous to use this split on a string which contains
two classes. You never know, another class having an underscore could be
added to this element in the future.

I change the logic a little, and in that case it is more safe with splitting and getting the id.

Another thing I find unclear: in and
PMA_convertFootnotesToTooltips() you have kept the principle of using
the instance of the footnote, even though the goal of the instance was
only to have unique ids. IMO you should get rid of the instance.

I removed it and pushed my changes to the repo.

Now I find two new errors with this.One is an firebug error which says w"http://localhost/phpmyadmin-gsoc/themes/pmahomme/img/ic_b_triggers 404 (Not Found)" when I click on "DB->Structure->insert". It appears in non ajax scenario also.

The next one is when I go to "Sakila" database and try to insert for actor_info table it gives an error. But in ajax enabled dialog shows the json string is not parsed clearly. I cannot parse the whole data content at the "$("td.insert_table a.ajax").live('click')" action in db_structure.js file because the returned content from tbl_change.php file is not 100% an json response. That ajax response was passed at the line 604 in common.lib.php and it seems not parsing correctly. Can you please help me on this issue. Thank you.

Regards,

Thilanka.