Rails - Jan 2010 - Print a PDF directly after prawnto with iframes

Hi,

I think I''m very near of accomplishing this but I have a problem.
This is the code:

<%- content_for :head do -%>
  <script type="text/javascript" charset="utf-8">
    function printPDF(){
      var pdf = document.getElementById("pdfDoc").contentWindow;
      pdf.focus();
      pdf.print();
    }
  </script>
<%- end -%>

<iframe src="/aaa.pdf" id="pdfDoc"
name="pdfDoc"></iframe>

<li><%= link_to ''Print'', {:controller =>
''receipt'', :action => ''print'',
:id => @receipt.id, :format => ''pdf''}, :target =>
''pdfDoc'' %></li>

And the print action:

  def print
    @receipt= Receipt.find(params[:id])
    prawnto :inline => true, :filename =>
"receipt_#{@receipt.codigo}"
  end

Now when I click in the link ''Print'' the iframe is reloaded
with the pdf
generated by prawn but I don''t know how to call then the printPDF
javascript function. If I just could call this javascript from the
controller (with ajax) or from the view with javascript after the iframe
is reloaded I would solve my problem.

Any help will be really appreciated!
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