anchor.diff:    $( "#game-container .clue-box" ).on( "click", function( event ) {
       $currentClue = $( this );
       setClueValue();
  -    showOverlay();
  +    showOverlay( event );
   
       var multiplier;
       switch ( $currentClue.data( "boxstate" ) ) {
  
positive.code:     }
    }
  
    function showOverlay() {
      vanishPoint = [ event.offsetY + event.target.offsetTop,
                      event.offsetX + event.target.offsetLeft ];
  
  
negative.code:   // Here to bottom: category title and topic entry.
    var oldValue;
  
    $( "#game-container .cat-title" ).on( "click", function() {
      $( this ).find( "p" ).focus();
    });
  
  