<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Ajax 状态测试</title>
<script type="text/javascript">
var xmlHttp = createXmlHttpRequestObject();
function createXmlHttpRequestObject(){var xmlHttp;try{ xmlHttp = new XMLHttpRequest();}catch(e){ var XmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0", "MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"); for (var i = 0; i < XmlHttpVersions.length && !xmlHttp; i++){ try { xmlHttp = new ActiveXObject(XmlHttpVersions[i]); } catch (e) {} }}if (!xmlHttp) alert("建立XMLHttpRequest object错误。");else return xmlHttp;}
function process(){if (xmlHttp){ try { xmlHttp.open("GET","http://www.baidu.com",false); xmlHttp.onreadystatechange = handleRequestStateChange; xmlHttp.send(null); } catch (e) { alert("不能连接服务器：/n" + e.toString()); }}}
function handleRequestStateChange(){myDiv = document.getElementById("myDivElement");if (xmlHttp.readyState == 1){ myDiv.innerHTML += "Requset status:1 (loading) <br />"}else if(xmlHttp.readyState == 2){ myDiv.innerHTML += "Requset status:2 (loading) <br />"}else if(xmlHttp.readyState == 3){ myDiv.innerHTML += "Requset status:3 (loading) <br />"}else if(xmlHttp.readyState == 4){ if (xmlHttp.status == 200) { try { response = xmlHttp.responseText; myDiv.innerHTML += "Requset status:4 (complete).服务器返回:<br />" myDiv.innerHTML = response; } catch (e) { alert("读取response错误:" + e.toString()); } } else { alert("接收数据时出现问题/n" + xmlHttp.statusText); }}}
function Button1_onclick() {process();
}
</script>
</head><body> 你好！服务器！ <br /> <input id="Button1" type="button" value="button" οnclick="return Button1_onclick()" /> <div id="myDivElement"> yy </div></body></html>
