window.addEvent('domready', function () { 
	$$('.hideLS').setStyle('display','none');
	$$('#tx-srfeuserregister-pi1-lst').each(
        function (el) {        
            el.addEvent(
                'click', 
                function() {
                	$$('.hideLS').setStyle('display', el.checked ? 'block' : 'none'); 
                }
            );
        }
    );
});