Playing A Sound On A Local Pc From The Web

I am developing a web application where each page shows a series of small jpg images each with an onClick event which plays a small mp3 file using javascript.

It all works perfectly but is a bit slow to load, so the customer wondered if we might develop a local version which, although the page was accessed via the web, the images and mp3s were installed on a users local pc (will be machine specific application anyway).

I have managed to do this for the images by using:

<img src="file:///C|/folder/home.jpg" onClick="EvalSound('shortname')">

and adding the site as a trusted site in IE7 (after much head scratching!).

However, my embed statement to embed the local mp3 files doesn't seem to work. I am using:

<embed src="file:///C|/folder/filename.mp3" autostart=false width=0 height=0 name="shortname" enablejavascript="true">

I have tried all sorts of versions of this path and nothing seems to work. I just get an 'unspecified error' when I click the image.