function output_invoice_header()
{
    global $pdf, $x_pos, $x_width, $x_text, $Y_Fields_Name_position, $invoice_font_markup, $invoice_font_size;
    global $set_parameters, $products_field_width, $field;
    //Create each Field Name
    $pdf->SetFont($pdf->font, $invoice_font_markup, $invoice_font_size);
    //Color filling each Field Name box
    $pdf->SetFillColor(PDF_INVOICE_MARK_COLOR_BG);
    $pdf->SetTextColor(PDF_INVOICE_MARK_COLOR);
    $x = $pdf->lMargin;
    $field = 0;
    for ($i = 0; $i < sizeof($x_width); $i++) {
        Make_Header_Cell($x, $x_width[$field], $x_text[$field]);
    }
    $pdf->SetTextColor(PDF_INVOICE_MARK_COLOR_STANDARD);
    $pdf->SetFillColor(PDF_INVOICE_MARK_COLOR_BG_STANDARD);
}
function output_invoice_header($Y_Fields_Name_position)
{
    global $pdf, $x_pos, $x_width, $x_text, $Y_Fields_Name_position;
    //Create each Field Name
    //Color filling each Field Name box
    $pdf->SetFillColor(PDF_INVOICE_MARK_COLOR_BG);
    $pdf->SetTextColor(PDF_INVOICE_MARK_COLOR);
    //Bold Font for Field Name
    $pdf->SetFont($pdf->font, BOLD, 10);
    $pdf->SetY($Y_Fields_Name_position);
    $x = $pdf->lMargin;
    $field = 0;
    for ($i = 0; $i < sizeof($x_width); $i++) {
        Make_Header_Cell($x, $x_width[$field], $x_text[$field]);
        $field++;
    }
    $pdf->Ln();
    $pdf->SetTextColor('Black');
}