var home = '';
var brand = '';
function set_home(url) {
    home = url;
}
function ub(brand_id) {
    brand = brand_id;
    window.location = home + '?brand=' + brand;
}
function um(model_id) {
    window.location = home + '?model=' + model_id;
}
function select(elid) {
    element = document.getElementById(elid);
    element.selected = true;
}