无刷新下载

 //文件下载(post无刷新)
        downLoadFile: function (option) {
            var method = option.method ? option.method : "post";
            var $iframe = $('<iframe id="downFileFrame" name="" style="display:none;" scrolling="yes" noresize ></frame>');
            var $form = $('<form method="' + method + '" action="' + option.url + '"></form>');
            if (option.data) {
                for (var key in option.data) {
                    $form.append('<input type="hidden" name="' + option.data[key].name + '" value="' + option.data[key].value + '"/>');
                }
            }
            $iframe.append($form);
            $(document.body).append($iframe);
            $form[0].submit();
            $iframe.remove();
        }

 common.downLoadFile({
            url: "../api/DeliveryCost/ExportMultiECRlist",
            data: $("#multiForm").serializeArray()
        });