You are welcome. I think the css problem is resolved.
The audio in the mdx contains ogg format like so:
<audio id="music266"> <source src="en/TopQuark/aaas.opus" type="audio/ogg"> </audio> <button onmousedown="document.getElementById('music266').play(); return false;" onmouseover="" >UK</button>
But the mdd which I can find contains mp3 files like so:
<a href="mdx://mdict.cn/sound/5188089/en/Atalina/take.mp3">US</a>
Therefore the problem is mismatched data format (apparently there are two totally different mdd+mdx combos, one for mp3, another for ogg audio formats)
My guess is that the possible causes are
- mismatched mdd - audio file format
- ogg file not supported by operating system or browser engine.