function showLayer(layerName) 
{
					if (eval("document.getElementById('"+ layerName +"').style.visibility") == 'visible'){
						eval("document.getElementById('"+ layerName +"').style.visibility = 'hidden'")
						eval("document.getElementById('"+ layerName +"').style.position = 'absolute'")
					}else{
						eval("document.getElementById('"+ layerName +"').style.visibility = 'visible'")
						eval("document.getElementById('"+ layerName +"').style.position = 'static'")
					}
}
function showlayers(layerName) 
	{
		eval("document.getElementById('"+ layerName +"').style.visibility = 'visible'")
		eval("document.getElementById('"+ layerName +"').style.position = 'static'")
	}
function hideLayer(layerName) 
	{
		eval("document.getElementById('"+ layerName +"').style.visibility = 'hidden'")
		eval("document.getElementById('"+ layerName +"').style.position = 'absolute'")
	}