code: function(evt)
  	{
  		return (evt.pointerType != null) ? (evt.pointerType == 'mouse' || evt.pointerType ===
  			evt.MSPOINTER_TYPE_MOUSE) : ((evt.mozInputSource != null) ?
  				evt.mozInputSource == 1 : evt.type.indexOf('mouse') == 0);
  	}
docs: Function: isMouseEvent
  
  Returns true if the event was generated using a mouse (not a pen or touch device).