code: function _fnEventAdd( sType, x, y, fn )
  	{
  		_oaoEvents[sType].push( {
  			"x": x,
  			"y": y,
  			"fn": fn
  		} );
  	}
docs: /*
  Function: _fnEventAdd
  Purpose:  Add an event to the internal cache
  Returns:  -
  Inputs:   string:sType - type of event to add, given by the available elements in _oaoEvents
  int:x - x-coords to add event to - can be null for "blanket" event
  int:y - y-coords to add event to - can be null for "blanket" event
  function:fn - callback function for when triggered