my97日期控件，前端設置。
<td width="20%" align="left" colspan="3"><input type="text" class="Wdate" id="selectBeginTime"
name="my.selectBeginTime"
onfocus="WdatePicker({dateFmt:'yyyy-MM-dd',maxDate:'#F{$dp.$D(\'selectEndTime\',{d:0});}',readOnly:true})"
value="<s:property value="my.selectBeginTime"/>" />
至
<input type="text" class="Wdate" id="selectEndTime"
name="my.selectEndTime"
onfocus="WdatePicker({dateFmt:'yyyy-MM-dd',minDate:'#F{$dp.$D(\'selectBeginTime\',{d:0});}',readOnly:true})"
value="<s:property value="my.selectEndTime"/>" />
</td>