MediaWiki:Common.js

function ModifySidebar( action, section, name, link ) {
try {
switch ( section ) {
	case 'languages':
		var target = 'p-lang';
		break;
	case 'toolbox':
		var target = 'p-tb';
		break;
	case 'navigation':
		var target = 'p-navigation';
		break;
	default:
		var target = 'p-' + section;
		break;
}

if ( action == 'add' ) {
	var node = document.getElementById( target )
					   .getElementsByTagName( 'div' )[0]
					   .getElementsByTagName( 'ul' )[0];

	var aNode = document.createElement( 'a' );
	var liNode = document.createElement( 'li' );

	aNode.appendChild( document.createTextNode( name ) );
	aNode.setAttribute( 'href', link );
	liNode.appendChild( aNode );
	liNode.className = 'plainlinks';
	node.appendChild( liNode );
}

if ( action == 'remove' ) {
	var list = document.getElementById( target )
					   .getElementsByTagName( 'div' )[0]
					   .getElementsByTagName( 'ul' )[0];

	var listelements = list.getElementsByTagName( 'li' );

	for ( var i = 0; i < listelements.length; i++ ) {
		if (
			listelements[i].getElementsByTagName( 'a' )[0].innerHTML == name ||
			listelements[i].getElementsByTagName( 'a' )[0].href == link
		)
		{
			list.removeChild( listelements[i] );
		}
	}
}

} catch( e ) {
// let's just ignore what's happened
return;
}
}

function CustomizeModificationsOfSidebar() {
// adds [[Special:CategoryTree]] to toolbox
//ModifySidebar( 'add', 'toolbox', 'CategoryTree', 'http://en.wikipedia.org/wiki/Special:CategoryTree' );
// removes [[Special:Upload]] from toolbox
ModifySidebar( 'remove', 'toolbox', 'Related changes', 'https://wiki.gacrc.uga.edu/wiki/Special:RecentChangesLinked/MediaWiki:Sidebar' );
}

addOnloadHook( CustomizeModificationsOfSidebar )