sub blackout {
    my $self = shift;
    my $message = 'hi!';
    $self->header_add(-type=>"text/plain");
    my $query = $self->query();
    my $output =  $query->start_html();
    $output .= $query->span($message);
    $self->add_json_header(boStatus=>'OK');
    $self->add_json_header(boError=>'SUCCESS');
    $self->add_json_header(boMessage=>$message);
    $output .= $query->end_html;
    return $output;
}

##</code><code>##

function tryJSON(app) {
    var url = '/cgi-bin/TryCGIApp.cgi';
    var params = "mode=blackout";
    new Ajax.Request(url, {
        onSuccess : function(resp,jsonheader) {
            var foo = jsonheader.boStatus;
            var funk = jsonheader.boError;
            alert("The response from the server is: " + foo + " and " + funk);
        },
        onFailure : function(resp) {
            alert("Oops, there's been an error.");
        },
        parameters : params
    });
}