function switchlayer(Layer_Name)
	{
	var DINO = document.getElementById? 1:0 ;
	var NS = document.layers? 1:0 ;
	var IE = document.all? 1:0 ;
	
	if (DINO)
		{document.getElementById(Layer_Name).style.display = (document.getElementById(Layer_Name).style.display=='block') ? 'none' : 'block';}
	else if (NS)
		{document.layers[Layer_Name].display = (document.layers[Layer_Name].display == 'block') ? 'none' : 'block';}
	else if (IE)
		{document.all[Layer_Name].style.display = (document.all[Layer_Name].style.display == 'block') ? 'none' : 'block';}
	}

function closelayer(Layer_Name)
	{
	var DINO = document.getElementById? 1:0 ;
	var NS = document.layers? 1:0 ;
	var IE = document.all? 1:0 ;
	
	if (DINO)
		{document.getElementById(Layer_Name).style.display= 'none';}
	else if (NS)
		{document.layers[Layer_Name].display='none';}
	else if (IE)
		{document.all[Layer_Name].style.display= 'none';}
	return false;
	}