WdatePicker()调用第二次时不起作用

 <div class="form-group">
            <label for="time" class="col-sm-2 control-label">时间起</label>
            <div class="col-sm-4">
                        <input type="text" class="datetimepicker datetime form-control"
                            readonly="readonly" placeholder="起始时间"id="starttime-trend">
                </div>
            <label for="time" class="col-sm-1 control-label">止</label>
            <div class="col-sm-5">
                    <input type="text" class="datetimepicker datetime form-control"
                    readonly="readonly" placeholder="结束时间" id="stoptime-trend">
            </div>
</div>

$(function(){
$("#stoptime-trend").click(function(){
var starttimeTrend = $("#starttime-trend").val();
if(starttimeTrend!=""){
var minDate=addDate(starttimeTrend,1);
var maxDate=addDate(starttimeTrend,20);
console.info("minDate:"+minDate);
console.info("maxDate:"+maxDate);//这里的值变成了10-10，但是日期控件上还是显示先前的9-02到9-21
WdatePicker({minDate:minDate,maxDate:maxDate});
}else{
WdatePicker();
}
});
});

不需要自己写代码，my97自己就有内置的函数

 <input type="text" class="datetimepicker datetime form-control"
               readonly="readonly" placeholder="结束时间" id="stoptime-trend" onclick="WdatePicker({ minDate: '#F{$dp.$D(\'starttime-trend\',{d:1});}', maxDate: '#F{$dp.$D(\'starttime-trend\',{d:20});}' });">

http://bbs.csdn.net/topics/390286539