jquery上传文件

$.ajaxFileUpload({url:'/contents/ajaxfileupload/doajaxfileupload.php',secureuri:false,fileElementId:'fileToUpload',dataType: 'json',beforeSend:function(){$("#loading").show();},complete:function(){$("#loading").hide();},success: function (data, status){if(typeof(data.error) != 'undefined'){if(data.error != ''){alert(data.error);}else{alert(data.msg);}}},error: function (data, status, e){alert(e);}})