var win = new Array() ;

function openPopup( name, url, size, title) 
{
	// open a new window 
	win[name] = window.open( url, name, size ) ;
	
	// give the new window focus
	if (
		( win[name] != null ) && 
		( win[name].closed == false ) 
	)
	{
		win[name].focus() ;
	}
	else 
	{ 
		return false ;
	}
}

function closePopup( window_name ) 
{
	if (
		win[window_name] != null && 
		! win[window_name].closed
	) 
	{
		win[window_name].close();
	}
	
	return ;
}