ajax成功后返回上一页

//租琴信息提交$('#rent_info_submit').click(function (){    $.ajax({        url : "{:U('Promotion/ajax_getReserved')}",        type : 'post',        data : $('#rent_info_form').serialize(),        success : function (res){            layer.msg(res['info'],{},function () {                if (res.status==1)  history.back();            });        },    });    return false;});