wav file question

I have a website designed in ASP.

I have a wav file that I need to insert, so when you get to the home page, it plays. However, I need it so when your go through pages on my site and then go back to the home page, the wav file doesn't play again.

Does anyone know how to set this up??

Thanks,
Gary

Using session variables:

<%
If Session("PlayedBleepySound")<>"true" then
%>
<!--write out HTML to embed wav file-->
<%
Session("PlayedBleepySound")="true"
end if
%>