// funzione popup
function popup_glossario(page,w,h) {
	w=600;
   var x = parseInt((screen.width - w) / 2);
   var y = parseInt((screen.height - h ) / 2)-20;
	window.open(page, 'Popup', 
	'width='+w+',left=' + x + ',top='+ y +', height='+ h +', resizable=no, toolbar=no, statusbar=no, menubar=no, scrollbars=yes');
}