function finestra(pagina, w, h) {
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	searchWin = window.open(pagina,'vota','scrollbars=no,resizable=no,width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',status=no,location=no,toolbar=no');
}