$('form').submit(function (event) {      event.preventDefault();      var form = $(this);      if (!form.hasClass('fupload')) {        //普通表单        $.ajax({          type: form.attr('method'),          url: form.attr('action'),          data: form.serialize()        }).success(function () {          //成功提交        }).fail(function (jqXHR, textStatus, errorThrown) {          //错误信息        });      }      else {        // mulitipart form,如文件上传类        var formData = new FormData(this);        $.ajax({          type: form.attr('method'),          url: form.attr('action'),          data: formData,          mimeType: "multipart/form-data",          contentType: false,          cache: false,          processData: false        }).success(function () {          //成功提交        }).fail(function (jqXHR, textStatus, errorThrown) {          //错误信息        });      };    });