IE8下ajax兼容问题

 1    function crossDomainAjax(url, successCallback) {
 2 
 3           // IE8 & 9 only Cross domain JSON GET request
 4           if (‘XDomainRequest‘ in window && window.XDomainRequest !== null) {
 5 
 6               var xdr = new XDomainRequest(); // Use Microsoft XDR
 7               xdr.open(‘get‘, url);
 8               xdr.onload = function () {
 9                   var dom = new ActiveXObject(‘Microsoft.XMLDOM‘),
10                 JSON = $.parseJSON(xdr.responseText);
11 
12                   dom.async = false;
13 
14                   if (JSON == null || typeof (JSON) == ‘undefined‘) {
15                       JSON = $.parseJSON(data.firstChild.textContent);
16                   }
17 
18                   successCallback(JSON); // internal function
19               };
20 
21               xdr.onerror = function () {
22                   _result = false;
23               };
24 
25               xdr.send();
26           }
27 
28           // IE7 and lower can‘t do cross domain
29           else if (navigator.userAgent.indexOf(‘MSIE‘) != -1 &&
30              parseInt(navigator.userAgent.match(/MSIE ([\d.]+)/)[1], 10) < 8) {
31               return false;
32           }
33 
34           // Do normal jQuery AJAX for everything else          
35           else {
36               $.ajax({
37                   url: url,
38                   cache: false,
39                   dataType: ‘json‘,
40                   type: ‘GET‘,
41                   async: false, // must be set to false
42                   success: function (data, success) {
43                       successCallback(data);
44                   }
45               });
46           }
47       }

 1           crossDomainAjax(url, function (data) {
 2 
 3               var newdata = data.Content;
 4               var str = "";
 5               for (var i = 0; i < newdata.length; i++) {
 6                   str += ‘<li><a href="http://www.XXX.com/Crawler.aspx?purl=‘ + encodeURI(newdata[i].Producturl) + ‘" target="_blank"><div><img src="‘ + newdata[i].img + ‘"/></div><p>‘ + newdata[i].Name + ‘</p></a><p class="red">￥‘ + newdata[i].pric + ‘</p></li> ‘;
 7               }
 8               if (data.img != "" && data.img != null) {
 9                   $(".banner img").attr("src", data.img)
10               } else {
11                   $(".banner").hide();
12               }
13               document.title = data.title + ‘- Panli代购‘;
14               callback(parseInt(data.Count));
15               $(".content ul").html(str);
16           });