app/views/stats/_chart.html.erb
<% @swf_count ||= 0 -%>
<div class="open-flash-chart"><%= swf_tag asset_path("open-flash-chart.swf"),
:flashvars => { 'width' => width, 'height' => height, 'data' => data},
:parameters => { 'allowScriptAccess' => 'sameDomain', 'wmode' => 'transparent'},
:div_id => "chart_#{@swf_count+=1}",
:size => "#{width}x#{height}" %></div>