Playing audio on Web pages
Sound files, which come in a variety of formats, are handled differently and inconsistently by different browsers and on different computers. For some measure of predictability and control, users can bring audio into Dreamweaver by first inserting it into a SWF file (created by Macromedia Flash). The SWF file will be played with the Flash plug-in, which comes with most browsers. Flash is a streaming technology, so audio files can start playing even before the entire file has been completely downloaded.
JavaScript control of audio embedded in an SWF file
A SWF file can be controlled with JavaScript behaviors. For instance, the clicking of a button can trigger the playing of a SWF file which houses an audio file. Unfortunately, a few browsers do not allow JavaScript to control embedded elements such as Flash movies. (See Not all browsers support JavaScript control of embedded content [TechNote 15431] for more information.)
Below is a chart showing which browsers support JavaScript control of embedded elements:
