how can I get audio(music) automatically playing on my web site when you open it.
Well, the next question should be - why do you want people to leave your site as soon as they get there?
otherwise:
<embed src="yourfilehere.wav" autostart="true" loop="false">
also see: http://www.htmlgoodies.com/tutorials/getting_started/article.php/3479411/So-You-Want-A-SoundEmbed-Huh.htm for more details.
thanks Dandello. I know it makes people leave, I just wondered how to do it.