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Topic: Hide information in PDF document
Conf: (P-PDF) Developers, Msg: 53662
From: vdallaire
Date: 5/29/2002 05:00 PM

I have a PDF document that contains 4 columns. By default, I want my fourth column to be hidden when I load the document. I created a field on that column and I set the border and background color to white. In that way the information on the fourth column is hidden. I have created also a button on the top of my document and a password text field. Into my button, I programmed a JavaScript that test the password written in the password text field. If this is the right password, my fourth column is show. I also programmed a JavaScript in the page open action to hide my fourth column with a field when the document is open

JavaScript in the button
var fieldPass = this.getField("pass");
var password = "password";
var enter = fieldPass.value;
var field = this.getField("field");
if (password != enter)
app."Wrong password");
field.hidden = true;

JavaScript in the page open event
var field = this.getField("field");
field.hidden = false;

My system works but I have one problem. When I open the document, I see my fourth column for about half a second and disappear after. When I change page or scroll the page very slowly I can see the hidden information blinking so I can view the hidden information.

How can I prevent my hidden information to blink? Is there a way to hide a column with a on_open_document_action ?

I want my fourth column really hidden until a user enter the right password even if the user change page, zoom in, scroll the page or move on page.


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