Someone

function checkAll() {    var check = $('div[id="uniform-undefined"] span');    var c = (check[0].className == '') ? 'checked' : '';    (c == '') ? check.removeClass('checked') : check.addClass('checked');    (c == '') ? $('input[type="checkbox"]').attr('checked', false) : $('input[type="checkbox"]').attr('checked', true);}