匿名Initialize Value for DateTime
The value is initialized when DateTimeBox has been created.
示例：
代码：
<div class="easyui-panel" style="width:100%;max-width:400px;padding:30px 60px;">
<div style="margin-bottom:20px">
<input class="easyui-datetimebox" label="Select DateTime:" labelPosition="top" value="10/11/2015 2:3:56" style="width:100%;">
</div>
</div>