function showHideDiv(div)
{
	if (visibility == 'block')
	{ 
		visibility = 'none'; 
	}
	else
	{ 
		visibility = 'block'; 
	} 
	if (document.all)
	{ 
		viewDiv = document.getElementById(div); 
		viewDiv.style.display = visibility; 
	} 
	if (document.layers)
	{ 
		document.layers[div].display = visibility; 
	} 
	if (document.getElementById &&!document.all)
	{ 
		viewDiv = document.getElementById(div); 
		viewDiv.style.display = visibility; 
	} 
}