MediaWiki:Common.js

Note: After publishing, you may have to bypass your browser's cache to see the changes.

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• Opera: Press Ctrl-F5.

$(document).ready(function() {
  $('h2').each(function() {
    var content = $(this).html();
    $(this).html('<div class="mw-collapsible">' + content + '</div>');
  });
});