code: function(event_name) {
  
  		if (event_name == 'mouse_events') {
  
  			this._events_listeners['mouseover'] =
  				Lava.Core.addGlobalHandler('mouseover', this.handleMouseMovement, this);
  			this._events_listeners['mouseout'] =
  				Lava.Core.addGlobalHandler('mouseout', this.handleMouseMovement, this);
  
  		} else {
  
  			this._events_listeners[event_name] =
  				Lava.Core.addGlobalHandler(event_name, this.onDOMEvent, this);
  
  		}
  
  	}
docs: Start listening to an event
  @param {string} event_name