Automatic order number on pdf form

[turkspartan]

So I want to add a PDF order form to my website. When I customer clicks "PDF Order Form" I want an order form to show up (which is easy). BUT my PDF form has a textbox that says "Order Number" and when a customer clicks the order form button I want an order number (such as 10,11,12,etc) to be filled into the order number text box.

 

How can this be accomplished?

 

Thanks.

[justsomeguy]

You can use PHP to generate a PDF. If you're talking about doing something in Javascript, then you need to rely on whatever the PDF reader they have supports. Try checking the documentation for Acrobat or Foxit or Sumatra to see if any of those readers support filling in form data by passing values on the URL or something similar.