I have the page VIEW-SALE.PHP on this page I have a submit button form to view the invoice in print format, there is the code:
<span style='display:inline-block'>
<form name='print' id='print' action='print-invoice.php'
target='_blank' method='post'>
<input type='hidden' name='invoice' value='$invoice'>
<input class='submit-all' type='submit'
value='Print the invoice'
onClick='window.print();return false'></form></span>
The code must just open the page PRINT-INVOICE.PHP and print it but when I click it it show the print dialog but of the current page I am VIEW-SALE.PHP so it does not show the PRINT-INVOICE.PHP
How does it can be done?