匿名Panel Header Alignment
The panel header can be aligned horizontally or vertically.
示例：
代码：
<div class="easyui-panel" title="Head on Top" style="width:700px;height:120px;">
</div>
<div class="easyui-panel" title="Head on Left" halign="left" titledirection="up" style="width:700px;height:120px;">
</div>
<div class="easyui-panel" title="Head on Right" halign="right" style="width:700px;height:120px;">
</div>