动态加载Jquery

function AjaxLoadJquerylibrary()  

        {  

            var d = document, s = d.getElementById('firebug-lite');  

            if (s != null)  

                return;  

            s = d.createElement('script');  

            s.type = 'text/javascript';  

            s.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1.3.1/jquery.min.js';  

            d.body.appendChild(s);  

            document.getElementById("content").style.display = "block";  

        }  

    </script>