Note: After saving, you have to bypass your browser's cache to see the changes. Internet Explorer: press Ctrl-F5, Mozilla: hold down Shift while clicking Reload (or press Ctrl-Shift-R), Opera/Konqueror: press F5, Safari: hold down Shift + Alt while clicking Reload, Chrome: hold down Shift while clicking Reload.
mw.loader.using( [ 'mediawiki.util', 'mediawiki.api.edit' ], function () {
	'use strict';
	if ( mw.config.get( 'wgNamespaceNumber' ) === 14 && !$( '.Taxonavigation' ).length ) {
		mw.util.addPortletLink(
			'p-tb',
			'#',
			'Taxon',
			't-taxon',
			'Lägg till kategorin "Biology pages without Taxonavigation"'
		);
		$( '#t-taxon' ).click( function ( e ) {
			e.preventDefault();
			var api = new mw.Api();
			api.postWithToken( 'edit', {
				action: 'edit',
				title: mw.config.get( 'wgPageName' ),
				summary: 'Adding [[:Category:Biology pages without Taxonavigation]] via [[User:Josve05a/taxa.js]]',
				appendtext: '\n[[Category:Biology pages without Taxonavigation]]'
			} );
		} );
	}
} );
//</nowiki>