function PopupCentrata() {
   var w = 460;
   var h = 300;
   var l = (screen.width) ? (screen.width-w)/2 : 0;
   var t = (screen.height) ? (screen.height-h)/2 : 0;
    finestra=window.open("montepana-web-cam.htm","","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
	if(finestra.window.focus){finestra.window.focus();}
 }