ProgressBar lost its text when put in a dialog

[CLKG]

I wanna simulate a loading/waiting effect by using dialog + progressbar, but I find progressbar doesn't show text when it's put in a dialog, I donno why.
dom goes like: <div><div class="easyui-progressbar"></div></div>

[stworthy]

Please try the code below:

Code:

<div class="easyui-dialog" style="width:400px;height:200px;padding:20px">
	<div id="p" class="easyui-progressbar"></div>
</div>