$('#edit-choose-2-from-options-below- [type="checkbox"]').on('click', function() { if($('#edit-choose-2-from-options-below- [type="checkbox"]:checked').length >= 5){ $('#edit-choose-2-from-options-below- [type="checkbox"]:not(":checked")').attr("disabled", true); } else{ $('#edit-choose-2-from-options-below- [type="checkbox"]:not(":checked")').attr("disabled", false); }});