+<form id=eval method=post>
+<input type=hidden name=name value="<%= $name %>">
+<div style="float: right">
+Eval code on each facet <tt>$value</tt> and <tt>$count</tt>
+<pre>
+$out->{sum} += $value * $count;
+$out->{sum}->{ $checked ? 'on' : 'off' } += $count;
+$checked = 1 if $count > 10;
+</pre>
+</div>
+% if ( my $out = stash('out') ) {
+<pre class=debug><%= dumper $out %></pre>
+% }
+<textarea name=code style="width: 100%">
+<%= param('code') %>
+</textarea>
+<input type=submit value="Eval on facet values">
+<input id=close name=close type=button value="Close" style="float: right">
+</form>
+