function NewWindow(mypage, myname, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	var winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable';
	var win = window.open(mypage, myname, winprops);
	if (parseInt(navigator.appVersion) >= 4) win.window.focus();
	return win;
}