//var xmlHttpReq = new ActiveXObject("MSXML2.XMLHTTP.3.0");
//定义变量，存储对象
var xmlHttp;
// 创建XMLHttpRequest对象
if (window.ActiveXObject) {
xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
} else if (window.XMLHttpRequest) {
xmlHttpReq = new XMLHttpRequest();
}
xmlHttpReq.open("GET", "http://localhost:9090/html5/test", false);
xmlHttpReq.onreadystatechange = handleStateChange;
xmlHttpReq.send();
// xmlHttpReq.responseText
// xmlHttpReq.responseXML
var htmlObj = "";
htmlObj += "=============状态码=================<br>";
htmlObj += "status=" + xmlHttpReq.status + "<br>";
htmlObj += "statusText=" + xmlHttpReq.statusText + "<br>";
htmlObj += "=============头信息=================<br>";
htmlObj += "heads=" + xmlHttpReq.getAllResponseHeaders() + "<br>";
htmlObj += "Content-Length=" + xmlHttpReq.getResponseHeader("Content-Length") + "<br>";
htmlObj += "=============返回信息=================<br>";
htmlObj += "responseStream=" + xmlHttpReq.responseStream + "<br>";
var obj = document.getElementById("showDiv");
obj.innerHTML = htmlObj;
function handleStateChange() {
// 请求的状态有5个值：0=未初始化；1=正在加载；2=已经加载；3=交互中；4=完成；
if (xmlHttpReq.readyState == 4) {
// 200对应OK，如404=未找到网页
if (xmlHttpReq.status == 200) {
// alert(xmlHttpReq.responseText);
}
}
}XMLHttpRequest和ActiveXObject学习
原文：http://blog.csdn.net/main_xtgjfge/article/details/18960409
