jQuery Ajax文件上传(php)

过程：
(1 )前端上文件的代码： test.php      

    <script type=”text/javascript” src=”jquery.js”></script>
    <script type=”text/javascript” src=”ajaxfileupload.js”></script>
    <script type=”text/javascript”>
       function ajaxFileUpload()
               {
                  $.ajaxFileUpload
                     (
                       {
                            url:’doajaxfileupload.php’, //你处理上传文件的服务端
                            secureuri:false,
                            fileElementId:’img’,
                            dataType: ‘json’,
                            success: function (data)
                                  {
                                    alert(data.file_infor);
                                  }
                               }
                         )

                       return false;