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  • create xmlhttprequest

     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 
     8                 for (var i = 0, len = versions.length; i < len; i++) {
     9                     try {
    10                         var xhr = new ActiveXObject(versions[i]);
    11                         arguments.callee.activeXString = versions[i];
    12                         return xhr;
    13                     } catch (ex) {
    14                         //omit
    15                     }
    16                 }
    17             }
    18             return new ActiveXObject(arguments.callee.activeXString);
    19         } else {
    20         throw new Error("no xhr object available.");
    21         }
    22     }
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  • 原文地址:https://www.cnblogs.com/ongoing/p/3086372.html
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