window.addEvent('domready', function(){
	if ( $$('.service_packs') ) {
		$$('.service_packs a').addEvent('click', function(e){
			e.stop();
			this.getParent('ul').getParent().getElements('li').removeClass('active');
			this.getParent().addClass('active');
		}); // addEvent
	}; // endif
});