Bug 13089 - Tab key triggers JavaScript error in the checkEnter function

Bug 13089 - Tab key triggers JavaScript error in the checkEnter function

Tabbing through fields in the patron add form or MARC editor triggers a
JavaScript error for each tab. The cause seems to be some JS which was
designed to accommodate differences between Mozilla browsers and
Internet Explorer. A slight modification seems to work just as well in
Firefox and IE.

To test, apply the patch and clear your browser cache if necessary. To
look for JavaScript errors, open the Developer Tools console in Firefox,
Chrome, or Internet Explorer (or in Firefox's Firebug console).

Create a new patron and use the tab key to move between inputs. No error
should be reported in the console. Test typing in fields and pressing
enter. The form should not be submitted.

Test in all available browsers, including at least IE11, IE10, and IE9.

Reproduced with FF 32
Tested with FF 32, Chrome 38, IE 11 and IE Emulations 8,9,10
No JavaScript errors found. Enter does not submit.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Tested in Chromium, confirmed the problem and that the patch fixes it.
Passes tests and QA script.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>