fix reveal download links code to work when the same sound exists several times

panikweb_templates/templates/includes/audio.html

@@ -15,9 +15,9 @@
 			
 		<button class="resymbol icon-download big"
 			title="Download file" 
-			onclick="$('#Download-{{ sound.file.url|slugify }}').toggle();return false;"
+			onclick="$(this).next().toggle();return false;"
 			></button>
-		<div class="hidden" id="Download-{{ sound.file.url|slugify }}" >
+		<div class="hidden">
 			{% if sound|is_format_available:'ogg' %}
 			<a target="_blank" class="button inBlock" href="{{ sound|format_url:'ogg' }}">
 				<span class="icon-file">&nbsp;ogg</span>