Conditional display of button?

[harmonybook]

We are displaying results from an Access database that includes a select button to open an associated .mp3 preview clip for some products. We need to find a way to have that button display only when such a file exists - which is only for half of the products. Everything we have tried has the button always appear for all products, which would then cause an error if the site user clicked on it. Any idea how we can make that displayed item & link conditional?

 

[xwb]

Do it from the server side (asp). If the file exists on the server, write out the button

<% if fso.FileExists ("xxx.mp3") then %>
<input type="button" name="playmp3" value="Play">
<% end if %>