1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
5 <title></title>
6 <script type="text/javascript" src="ajax.js"></script>
7 <script type="text/javascript" src="test06.js"></script>
8 </head>
9 <body>
10
11 </body>
12 </html>
1 function createXHR() {
2 if (typeof XMLHttpRequest != "undefined") {
3 return new XMLHttpRequest();
4 } else if (typeof ActiveXObject != "undefined") {
5 if (typeof arguments.callee.activeXString != "string") {
6 var versions = ["MSXML2.XMLHttp.6.0", "MSXML2.XMLHttp.3.0", "MSXML2.XMLHttp"];
7 for (var i = 0, len = versions.length; i < len; i++) {
8 try {
9 var xhr = new ActiveXObject(versions[i]);
10 arguments.callee.activeXString = versions[i];
11 return xhr;
12 } catch (ex) {
13 console.log("异常");
14 }
15 }
16 }
17 return new ActiveXObject(arguments.callee.activeXString);
18 } else {
19 throw new Error("No XHR object available.");
20 }
21 }
var xhr = createXHR();
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
if ((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304) {
console.log(xhr.responseText);
} else {
console.log("Request was unsuccessful: " + xhr.status);
}
}
};
xhr.open("get", "example.txt", true);
xhr.send(null);
//取消异步请求
//xhr.abort();
