bootstrap datetimepicker 日期控件清空问题

<link href="../../js/bootstrap/css/bootstrap.css" rel="stylesheet" type="text/css" />
<link  href="../../js/bootstrap-datetimepicker/bootstrap-datetimepicker.css" rel="stylesheet" type="text/css" />
<script src="../../js/bootstrap-datetimepicker/bootstrap-datetimepicker.js" type="text/javascript"></script>
<script src="../../js/bootstrap-datetimepicker/bootstrap-datetimepicker.zh-CN.js" type="text/javascript"></script>

1.引入bootstrap的组件DateTimePicker
2.DateTimePicker删除例子

<div class="input-group date" data-date="" data-date-format="dd MM yyyy" data-link-field="dtp_input2" data-link-format="yyyy-mm-dd">
                <input type="text" name="endDate" placeholder="入库结束时间" id="endDate"
                       class="form-control form_datetime" maxlength="255"
                       readonly="readonly" />
                <span class="input-group-addon"><span class="glyphicon glyphicon-remove"></span></span>
            </div>

3.js代码调用日期

$('.form_datetime').datetimepicker({
        format: "yyyy-mm-dd",
        language:  'zh-CN',
        autoclose: true,
        todayBtn: true,
        minView: "month"
    });
    //清除的代码
    $(".glyphicon-remove").click(function(){
            $($($(this).parent()).prev()).val("");
        })

4.效果图