function popupPrintableVersion(url) {
	var width = window.screen.width * 0.5;
	var height = window.screen.height * 0.5;
	var top = (window.screen.width - width)/2;
	var left = (window.screen.height - height)/2;
	window.open(url, 'stampa', 'width=' + width + ',height=' + height + ',scrollbars=yes,menubar=no,resizable=yes,top=' + top + ',left=' + left);
}

function printDocument() {
  if (confirm( 'Stampare il documento ?' ) ) window.print();
  window.close();
}