Select Code to Download

<form name="csvform" action="/myapp.pl/downloadcsv" method="POST">
<input type="submit" name="csv" id="csv" value="Generate CSV File" onc
+lick="return SubmitTheCSVForm();" />
</form>

var submitted = false;
function SubmitTheCSVForm() {
...
  submitted = true;
  document.csvform.submit();
}

sub downloadcsv : Runmode {
  my $self = shift;
...

}

sub csv_status : Runmode {
  my $self = shift;
...
  return $template->output;
}

<TMPL_IF STILL_RUNNING>
...
<h3> Job complete!</h3>
</TMPL_IF>