摘要：
var createXHR = function() { var xhr, last_e; var PROGIDS = [ "Msxml2.XMLHTTP.6.0", //"Msxml2.XMLHTTP.5.0", // 此版本目的是给MS Office App使用, // Web中用会弹出安全对话框 "Msxml2.XMLHTTP.4.0", // Have issues, a buggy version "Msxml2.XMLHTTP.3.0", "Msxml2.XMLHTTP", &quo 阅读全文
