function loadMakeDate(maker, type, no) {
    var url = '/amm/get/';
    var params = { 
        maker: maker,
        type: type,
        no: no
    };
    
    showPreloader();
    new Ajax.Request(url,
    {
        method:'post',
        parameters: params,
        onSuccess:
            function(transport){
                hidePreloader();
                $('dataspace').update(transport.responseText);
            },
        onFailure:
            function() {
                hidePreloader();
                alert('Something went wrong... Try again later');
            }
    });
}

function showPreloader() {
    $('btnSearch').disable();
    $('btnSearch').value = 'Загрузка...';
}

function hidePreloader() {
    $('btnSearch').enable();
    $('btnSearch').value = 'Поиск';
}