// Toggle visibility of object.
function folio_artifact_ToggleVisible( sElement_id, boolVisible ) {
    if ( boolVisible ) {
        Effect.Appear(sElement_id +'_text','appear');
        Effect.Fade(sElement_id+ '_expand','appear');   
    } else {
        Effect.Fade(sElement_id +'_text','appear');   
        Effect.Appear(sElement_id +'_expand','appear');
    }
}