/*if (navigator.appName == "Netscape") 
	{
        layerRef="document.layers";
        styleSwitch=".style";
    } 
	else 
	{
        layerRef="document.all";
        styleSwitch=".style";
    }

function showLayer(layerName) 
{
        eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
}
        
function hideLayer(layerName) 
{
        eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
}
*/
function showLayer(layerName)
{
	var obj=document.getElementById(layerName);
	obj.style.visibility = "visible";
}
function hideLayer(layerName)
{
	var obj=document.getElementById(layerName);
	obj.style.visibility = "hidden";
}