Replace textarea doesn't work if textarea name/id contains dot

[Angelo Immediata]

Hi. I tried this little sample: i downloaded ckeditor3 beta 2 release. I went in _sample directory, opened the replacebycode.html page and changed the first testarea name/id from editor1 to editor1.pippo and i left original the editor2 name/id. I opened the replacebycode.html page with firefox and IE and in both of them i couldn't write in the first textarea while all worked pretty good in second textarea. So it seems that when textarea id/name contains dot (that is editor1.pippo there is a dot between editor1 and pippo) the Javascript code doesn't work good.

[Artur Formella]

DUP of #3497