noob: anchor_popup , how generate a popup 100% screen

[eluser]Peter74[/eluser]
Hi all, well i need the popup with the 100% of the screen client ( is a application )
i have from the docs this

Code:

<?php
$atts = array(
              'width'      => '1024',
              'height'     => '768',
              'scrollbars' => 'no',
              'status'     => 'yes',
              'resizable'  => 'yes',
              'screenx'    => '0',
              'screeny'    => '0'
            );
echo anchor_popup('agenda/agenda','text',$atts);
?>

i dont know how to accomplish that

very txs for ur help
Peter