lue="ETL"> </span>
                            </div>
                        </div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label">表达式</label>
                            <div class="col-sm-10">
                                <input id="expr" name="expr" type="text"
                                       placeholder="example:100s,100m,100h,1d or corn 表达式,默认1d" class="form-control" aria-required="true"> </span>
            