value="">
            <input type="text" class="form-control required" name="scheduling" value="">
            <div class="input-group-btn">
                <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Please choose<span class="caret"></span></button>
                <ul class="dropdown-menu dropdown-menu-right">
                    <li><a href="javascript:;" data-bind="0 0/1 * * * ? *">每1分钟</a></li>
                   