functioncreateXHR(){if(typeofXMLHttpRequest!='undefined'){returnnewXMLHttpRequest();}elseif(typeofActiveXObject!='...
function createXHR() {
if (typeof XMLHttpRequest != 'undefined') {
return new XMLHttpRequest();
} else if (typeof ActiveXObject != 'undefined') {
var version = [
'MSXML2.XMLHttp.6.0',
'MSXML2.XMLHttp.3.0',
'MSXML2.XMLHttp'
];
for (var i = 0; version.length; i ++) {
try {
return new ActiveXObject(version[i]);
} catch (e) {
//跳过
}
}
} else {
throw new Error('您的系统或浏览器不支持XHR对象！');
}
}全文详见：http://xpxw.com/?id=7