function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == 'Microsoft Internet Explorer'){
        ro = new ActiveXObject('Microsoft.XMLHTTP');
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function sndReq(id_name) {
    http.open('get', '/netcat/modules/netshop/post.php'+make_action(id_name));
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() {
    if(http.readyState == 4){
        var response = http.responseText;
        var update = new Array();
        if(response.indexOf('|' != -1)) {
            update = response.split('|');
var cart = 'my_cart';
var regexp=/my_cart/g
update[1] = update[1].replace(regexp,  "")
            document.getElementById(cart).innerHTML = update[1];
        }
    }
} 

function make_action(id_name) {
   action = "?redirect_url=http://www.megalavka.ru/cart1/&cart_mode=add&"+id_name+"=1&request=get";
   return action;
}