function apply_classes(selector, add, remove) {
var el = document.querySelector(selector);
if (el) {
el.classList.add(add);
el.classList.remove(remove);
}
}
function close_prebooksItems1() {
apply_classes('.preblock_hs_itm1_active', 'preblock_hs_itm1_passive', 'preblock_hs_itm1_active');
}
/// другие функции