var http = createRequestObject();

        // Ajax request object
        function createRequestObject()
        {
                var tmpXmlHttpObject;


                // Mozilla, Safari
                if (window.XMLHttpRequest)
                {
                        tmpXmlHttpObject = new XMLHttpRequest();
                }

                // IE would use this method ...
                else if (window.ActiveXObject)
                {
                        tmpXmlHttpObject = new ActiveXObject("Microsoft.XMLHTTP");
                }

                return tmpXmlHttpObject;
        }