function toggle(div_id)
{
	var el = document.getElementById(div_id);
	
	if(el.style.display == 'none')
	{
		el.style.display = 'block';
	}
	else
	{
		el.style.display = 'none';
	}
}

function popup(windowname)
{
	toggle('blanket');
	toggle(windowname);		
}