ajax xml httpreuqest

    <script type="text/javascript" language="javascript">

        function $(id)
        {
           return document.getElementById(id).value;
        
        }

        function HttpWorker() { };

        HttpWorker.httpCreate = function()
        {
            var http;

            if (window.ActiveXObject)
                http = new ActiveXObject("Microsoft.XMLHTTP");
            else
                http = new XMLHttpRequest();

            return http;
        }


        HttpWorker.httpExecuet = function(object) {

            

            object.request.open(object.method, object.url, object.async);
            object.request.setRequestHeader("Cookie", "sessionid=15BA1020BF2299F73ECA68F3");
            object.request.send(object.para);

            object.request.onreadystatechange = function() {
                if (object.request.readyState == 4) {

                    if (object.request.status == 200) {
                        alert(object.request.responseText);
                    }
                }

            }
        }

        function htmlGet()
        {
            var http_request = HttpWorker.httpCreate(), para;
            
            para = { method: 'get', url: $('txt_url'), async: true, para: null, request: http_request };
            
            HttpWorker.httpExecuet(para);
        }

       
    
    </script