function openWin(content,w,h,isscroll,isresize) { // pagina, larghezza, altezza, se-scrollabile, se-ridimensionabile
	var t = (screen.height) ? (screen.height-h)/2 : 0;
	var l = (screen.width) ? (screen.width-w)/2 : 0; 
	finestra=window.open(content,'zoom','scrollbars=' + isscroll + ',resizable=' + isresize + ',width=' + w + ',height=' + h + ',top=' + t + ',left=' + l + ',status=no,location=no,toolbar=no');
	finestra.focus();
}