IE8 AJAX 不能正常工作 解決辦法

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function crossDomainAjax(url, successCallback) {    // IE8 & 9 only Cross domain JSON GET request    if (‘XDomainRequest‘ in window && window.XDomainRequest !== null) {        var xdr = new XDomainRequest(); // Use Microsoft XDR        xdr.open(‘get‘, url);        xdr.onload = function () {            var dom = new ActiveXObject(‘Microsoft.XMLDOM‘),                JSON = $.parseJSON(xdr.responseText);            dom.async = false;            if (JSON == null || typeof (JSON) == ‘undefined‘) {                JSON = $.parseJSON(data.firstChild.textContent);            }            successCallback(JSON); // internal function        };        xdr.onerror = function () {            _result = false;        };        xdr.send();    }        // IE7 and lower can‘t do cross domain    else if (navigator.userAgent.indexOf(‘MSIE‘) != -1 &&             parseInt(navigator.userAgent.match(/MSIE ([\d.]+)/)[1], 10) < 8) {        return false;    }        // Do normal jQuery AJAX for everything else              else {        $.ajax({            url: url,            cache: false,            dataType: ‘json‘,            type: ‘GET‘,            async: false, // must be set to false            success: function (data, success) {                successCallback(data);            }        });    }}

    crossDomainAjax(url, function (data) {            if ("1" != data) {//data.message                alert(data);            } else {                alert("發送成功!");                if (isTree == "1") {                    searchTreedata();                } else {                    searchdata();                }            }        });

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IE8 AJAX 不能正常工作 解決辦法