nl_tokens: These woulkd be simpler using closer variables below
pl_tokens: function optOnIconMouseDownListener ( e ) { // outlineIcons.src.icon_opton  needed? var target = thisOutline . targetOf ( e ) var p = <mask> . parentNode termWidget . replaceIcon ( p . parentNode , outlineIcons . termWidgets . optOn , outlineIcons . termWidgets . optOff , optOffIconMouseDownListener ) p . parentNode . parentNode . removeAttribute ( 'optional' ) }