function ShowPopup(l)
{
	if (document.layers)
	{
		if (document.layers[l])
			document.layers[l].visibility = 'visible';
	}
	else
	if (document.all)
	{
		if (document.all[l])
			document.all[l].style.visibility = 'visible';
	}
	else
	if (document.getElementById)
	{
		if (document.getElementById(l))
			document.getElementById(l).style.visibility = 'visible';
	}
}

function HidePopup(l)
{
	if (document.layers)
	{
		if (document.layers[l])
			document.layers[l].visibility = 'hidden';
	}
	else
	if (document.all)
	{
		if (document.all[l])
			document.all[l].style.visibility = 'hidden';
	}
	else
	if (document.getElementById)
	{
		if (document.getElementById(l))
			document.getElementById(l).style.visibility = 'hidden';
	}
}