public PdfFormField AddHtmlPostButton(string name, string caption, string value, string url, BaseFont font, float fontSize, float llx, float lly, float urx, float ury)
{
PdfAction action = PdfAction.CreateSubmitForm(url, null, PdfAction.SUBMIT_HTML_FORMAT);
PdfFormField button = new PdfFormField(writer, llx, lly, urx, ury, action);
SetButtonParams(button, PdfFormField.FF_PUSHBUTTON, name, value);
DrawButton(button, caption, font, fontSize, llx, lly, urx, ury);
AddFormField(button);
return button;
}