var my_window

function openPopupWindow( uri, name, opts )
{
	my_window = window.open( uri, name, opts );

	if( my_window )
	{
		if( my_window.focus )
		{
			my_window.focus();
		}

		return true;
	}

	return false;
}

function closePopupWindow()
{
	if(false == my_window.closed) 
	{
		my_window.close ();
		}
		else
		{
			/*alert('Window already closed!');*/
		}
}