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;
});