var g_loaded = false;

function showMapOverlay()
{
	var map = document.getElementById("mapoverlay");
	map.style.display = "block";
	if(!g_loaded)
	{
		load();
		g_loaded=true;
	}
}

function hideMapOverlay(){
	var map = document.getElementById("mapoverlay");
	map.style.display = "none";
}