利用xmlhttp可以实现页面无刷新数据更新技术

<script language="javascript">
function xmlhttp()
{
    var http = new ActiveXObject("MicrosoftXMLHTTP");
    http.open("GET",".../http.aspx",false);
    http.send();
    var str = http.responseText;
    spninner.innerHtml = str;
}
</script>
<span name="spninner"></span>