//ajax
var http_request = false;

function makeRequest(url, idname) {
    http_request = false;

    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
        }
    } else if (window.ActiveXObject) { // IE
    try {
        http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
                    } catch (e) {}
            }
    }

    if (!http_request) {
        alert('Cannot create an XMLHTTP instance');
        return false;
    }
    http_request.onreadystatechange = function() { alertContents(http_request, idname); };
    http_request.open('GET', url, true);
    http_request.send(null);
}

function alertContents(http_request, idname) {
    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
            document.getElementById(idname).innerHTML = http_request.responseText;
        } else {
            alert('There was a problem with the request.');
        }
    }else{
        document.getElementById(idname).innerHTML = '<img src="/images/loading.gif" style="padding:10px;" />';
    }
}
///////////////////catalog//////////////////////////
function changeCheck(id) {
    d = document;
    if(d.getElementById('c' + id).checked == true) {
        d.getElementById('c' + id).checked = false;
        d.getElementById('n' + id).disabled = true;
    }else{
        d.getElementById('c' + id).checked = true;
        d.getElementById('n' + id).disabled = false;
    }
}