function ToggleHourGlass(hourGlassId) {
	if (typeof hourGlassId == "undefined") {
		hourGlassId = "hourGlass";
	}
	
	// hide banners when we show the hourglass
	ShowBanners(false);

	HourGlass = document.getElementById(hourGlassId);
	if (HourGlass != null) {
		HourGlass.style.display = "block";
	}
	window.onunload = ToggleHourGlassOff;
}

function ToggleHourGlassOff(hourGlassId) {
	if (typeof hourGlassId == "undefined") {
		hourGlassId = "hourGlass";
	}

	// show banners when we hide the hourglass
	ShowBanners(true);

	HourGlass = document.getElementById(hourGlassId);
	if (HourGlass != null) {
		HourGlass.style.display = "none";
	}
}