【解決方法】ajax を使用したクロスドメイン呼び出し

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ajaxでクロスドメイン呼び出しを行っています。しかし、エラーまたはUncaught SyntaxError: Unexpected tokenが発生します:

JavaScript

<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
 <script type="text/javascript">
 debugger;
     var prodID = "4220";
     var txRef = "d38e92010";
     var amt = "10000";
     var hasKey = "60e0fac58c36accabc393172d6546320ecf00628fbba3a4bb4f9ef72c51f1c11e0c677fd9de5f7b9e45e2336871617fa845b24a6c85d541fc5a59726537d0abf";
     var mackey = "199F6031F20C63C18E2DC6F9CBA7689137661A05ADD4114ED10F5AFB64BE625B6A9993A634F590B64887EEB93FCFECB513EF9DE1C0B53FA33D287221D75643AB";
     var trgurl = "https://stageserv.interswitchng.com/test_paydirect/api/v1/gettransaction.json?productid=" + prodID + "&transactionreference=" + txRef + "&amount=" + amt + "&hash=" + hasKey + "&mackey=" + mackey + "";


     $.ajax({
         url: trgurl,
         dataType: 'JSONP',
         type: 'GET',
         contentType: 'application/json',
         crossDomain: true,
         success: function (data) {
             debugger;
             alert('success!' + data);
         },
         error: function (data) {
             debugger;
             alert('success!' + data);
         },
         complete: function (xhr, status) {
             debugger;

         }
     });

</script>