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