function NewWindow(URL, w, h) {
	var from_left = (screen.width - w) / 2;
	var from_top = (screen.height - h) / 2;
	win_properties = 'height='+h+',width='+w+',top='+from_top+',left='+from_left+''
	var win_name ="window"+new Date().getTime();
	win = window.open(URL, win_name, win_properties);
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}