function searchRoomCom() {
    $("#searchForm").submit();
}

$(function () {
    $("#ln").change(searchRoomCom);
    $("#st").change(searchRoomCom);
    $("#ly").change(searchRoomCom);
    $("#by").change(searchRoomCom);
    if ($("#dc").get()) {
        $("#dc").change(searchRoomCom);
    }
});