function ajax(url,id) {
        var http_request = false;

        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
                // See note below about this line
            }
        } 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('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        http_request.onreadystatechange = function() { 
		showresult(http_request,id); 
			};



        http_request.open('GET', url, true);
        http_request.send(null);
    }
    function showresult(http_request,id) {
document.getElementById(id).innerHTML="<center><img src=\"template/images/load.gif\"><br><p><b><font size=2>Đang sử lý....</font></b></p></center>";
        if (http_request.readyState == 4) {
            if (http_request.status == 200) {
			document.getElementById(id).innerHTML=http_request.responseText;
                //alert(http_request.responseText);
            } else {
document.getElementById(id).innerHTML="<center><b><p><font color=red size=2>Trang mà bạn đang cố gắng truy cập đã bị xóa</font></b></p></center></td></tr></table>";
            }
        }

    }