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.util.addPortletLink('p-personal','/wiki/Special:PrefixIndex/User:Gadget850','My subpages','pt-mysubpages','Show my subpages',null,'#pt-preferences');mw.util.addPortletLink('p-tb',mw.config.get('wgServer')+mw.config.get('wgArticlePath').replace("$1","Special:PrefixIndex/"+mw.config.get('wgPageName')+"/"),'Subpages');