Clicking a link does happen on the browser-side - and perl can't be used there (at least no version that I know of ;) So Sinister is right.

But I doubt that you can start a sound when clicking on a link. Playing a sound is a page-specific thing that is just done while a page is displayed - not when it changes. To say it in other words: If you really want to do it that way the user will have to wait until your sound stopped before the next page will be loaded. I don't think that this is very userfriendly, so try to avoid it.

Conclusion: This in nothing perl-related - get yourself a good JavaScript documentation.
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use signature; signature(" So long\nAlfie");