function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function toggleLayer(divname)
{
	if(document.getElementById(divname).style.display=="block")
	{
		document.getElementById(divname).style.display="none";
	}
	else
	{
		hideAllLayers();
		document.getElementById(divname).style.display="block";
	}
}
function hideAllLayers()
{
	document.getElementById("home").style.display="none";
	document.getElementById("about").style.display="none";
}