/** Adds a JavaScript action at the document level. When the document
* opens all this JavaScript runs. The existing JavaScript will be replaced.
* @param name the name for the JavaScript snippet in the name tree
* @param js the JavaScript code
*/
public virtual void AddJavaScript(String name, String js)
{
stamper.AddJavaScript(name, PdfAction.JavaScript(js, stamper, !PdfEncodings.IsPdfDocEncoding(js)));
}