function $( id )
{
	
	return document.getElementById( id ) ;
	
}

function rollover( idPart )
{
	
	try
	{
		var answer = $( 'A' + idPart ) ;

		if ( answer.style.display == "none" )
			answer.style.display = "block" ;
		else
			answer.style.display = "none" ;
		
	}
	catch( e )
	{
		
		alert( e.toString( ) ) ;
		
	}
	
}