1 function createXHR(){
2 if(
typeof XMLHttpRequest != "undefined"
){
3 createXHR =
function(){
4 return new XMLHttpRequest();
5 };
6 }
else if(
typeof ActiveXObject != "undefined"
){
7 createXHR =
function(){
8 if(
typeof arguments.callee.activeXString != "string"
){
9 var versions = ["MSXML2.XMLHttp.6.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp"
];
10 for(
var i=0,len=versions.length;i<len;i++
){
11 try{
12 var xhr =
new ActiveXObject(versions[i]);
13 arguments.callee.activeXString =
versions[i];
14 return xhr;
15 }
catch (ex){
16 console.log("异常"
);
17 }
18 }
19 }
20 return new ActiveXObject(arguments.callee.activeXString);
21 };
22 }
else{
23 createXHR =
function(){
24 throw new Error("No XHR object available."
);
25 };
26 }
27 return createXHR();
28 }
转载于:https://www.cnblogs.com/qzsonline/archive/2012/06/05/2537260.html
