Apply Dynamic Stamp to all PDF pages at one click

EDITED

Thanks for your response,

I want to apply a stamp to all the pages of a document. When I apply the stamp, a data entry box should appear once to prompt the user to enter data and apply stamp to all pages in a document automatically at one click.

BUT keep updating "seiten" field for page numbering according to the page number of a document.

The stamp consists of two text fields:

- The first field is for entering data in a box.
- The second field, labeled 'Seiten,' should automatically display the current page number and keep track of the total number of pages in the document.

if ((event.source.forReal) && (event.source.stampName == "#Abrechnung")) {
    var cAsk = "Please enter Anlagen-Nr";
    var cTitle = "Abrechnung";
    var cMsg = app.response(cAsk, cTitle);
    event.value = cMsg;
}