function makeRequest(url, func) {
 //alert (url )
    var http_request = false;
    //var url = ;

    if (window.XMLHttpRequest) {
        http_request = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        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;
    }

    // 定義事件處理函數為 alterContents()
    http_request.onreadystatechange = function() { alertContents(http_request, func); };
    http_request.open('GET', url, true);
    http_request.send(null);
}



function alertContents(http_request, func) {


    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
//alert (func )
            func(http_request.responseText);

      
        }

    }
}