function myOpenWindow(url, larghezza, altezza) {
	var ScreenWidth=window.screen.width;
	var ScreenHeight=window.screen.height;
	var movefromedge=0;
	placementx=(ScreenWidth/2)-((larghezza)/2);
	placementy=(ScreenHeight/2)-((altezza+50)/2)-50;
	window.open (url, "_blank", "width="+larghezza+", height="+altezza+", toolbar=0, location=0, directories=0, status=no, scrollbars=1, menubar=0, resizable=yes, left="+placementx+", top="+placementy+", screenX="+placementx+", screenY="+placementy+",");
}