function show1(op)
{
	if(op=="hiddenLayer_1")
	{
		document.getElementById("hiddenLayer_1").style.display="block";
		document.getElementById("hiddenLayer_1a").style.display="none";
	}
	if(op=="hiddenLayer_1a")
	{
		document.getElementById("hiddenLayer_1a").style.display="block";
		document.getElementById("hiddenLayer_1").style.display="none";
	}
}
setTimeout("show1('hiddenLayer_1a')",5000);