function esconderdiv() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('hideShow').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.hideShow.visibility = 'hidden';
}
else { // IE 4
document.all.hideShow.style.visibility = 'hidden';
}
}
}


function showhide(layer_ref)
{

	if (document.all) //IS IE 4 or 5 (or 6 beta)
	{ 
		eval( "state = document.all." + layer_ref + ".style.display");
	}
	if (document.layers) //IS NETSCAPE 4 or below
	{
		state = document.layers[layer_ref].display;
	}
	if (document.getElementById &&!document.all) 
	{
		hza = document.getElementById(layer_ref);
		state = hza.style.display;
	}	

	if (state == 'block') 
	{
		state = 'none'; 
	}
	else
	{
		state = 'block';
	}
	
	if (document.all) //IS IE 4 or 5 (or 6 beta)
	{ 
		eval( "document.all." + layer_ref + ".style.display = state");
	}
	if (document.layers) //IS NETSCAPE 4 or below
	{
		document.layers[layer_ref].display = state;
	}
	if (document.getElementById &&!document.all) 
	{
		hza = document.getElementById(layer_ref);
		hza.style.display = state;
	}
}