把这个代码用微软的ajax怎么实现??实现同样功能
<P><script type="text/javascript"></P><P><BR>var http_request = false;</P>
<P>function send_request(url) {//初始化、指定处理函数、发送请求的函数</P>
<P>http_request = false;<BR>//开始初始化XMLHttpRequest对象<BR>if(window.XMLHttpRequest) { //Mozilla 浏览器<BR>http_request = new XMLHttpRequest();<BR>if (http_request.overrideMimeType) {//设置MiME类别<BR>http_request.overrideMimeType('text/xml');<BR>}<BR>}<BR>else if (window.ActiveXObject) { // IE浏览器<BR>try {<BR>http_request = new ActiveXObject("Msxml2.XMLHTTP");<BR>} catch (e) {<BR>try {<BR>http_request = new ActiveXObject("Microsoft.XMLHTTP");<BR>} catch (e) {}<BR>}<BR>}</P>
<P>if (!http_request) { // 异常，创建对象实例失败<BR>window.alert("不能创建XMLHttpRequest对象实例.");<BR>return false;<BR>}<BR>//http_request.onreadystatechange = processRequest;<BR>// 确定发送请求的方式和URL以及是否同步执行下段代码<BR>http_request.open("GET", url, true);<BR>http_request.send(null);<BR>var divv2= document.getElementById("divv2").innerHTML;<BR>divv2.innerHTML = http_request.responseText;<BR>}</P>
<P><BR></script></P>
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