function NewQuery(method, url, callback, data) {
    var xhr;
    if (window.XMLHttpRequest) {
        xhr = XMLHttpRequest();
    } else if (window.ActiveXObject) {
        xhr = ActiveXObject("MSXML2.XMLHTTP");
    } else {
        alert("Извините, AJAX не для вас.");
        return;
    }
    xhr.open(method, url, true);
    xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
    if (method == 'post') xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4 && xhr.status == 200) callback(xhr.responseText);
    }
    if(data){xhr.send(data)}else{xhr.send()};
}

function GetAjax(sURL, callback) {
    NewQuery("get", sURL, function(responseText) {
        if (callback) {
            callback(responseText)
        } else {
            try {
                eval(responseText);
            } catch (e) {
                alert(e);
            }
        }
    });
}

function PostAjax(sURL, $form, callback) {
    var data = '';
    if (typeof $form == "object") {
        $("*[name]", $form).each(function() {
            data += this.name + "=" + (this.type=="checkbox"?(this.checked?1:0):encodeURIComponent($(this).val())) + "&"; 
        });
    } else {
        data = $form
    }
    NewQuery("post", sURL, function(responseText) {
        if (callback) {
            callback(responseText)
        } else {
            try {
                eval(responseText);
            } catch (e) {
                alert(e);
            }
        }
    }, data)
}