$(document).ready(function () {
	ExtendQuickLaunch();
});

function ExtendQuickLaunch() {
	$('div.ms-quicklaunch-navmgr ul li ul').hide();
	$('div.ms-quicklaunch-navmgr li.selected').parents('ul').show();
	$('div.ms-quicklaunch-navmgr li.selected').children('ul').show();

}