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		}
	},
	send_ws_message: function(obj) {
		if (this.ws)
			this.ws.send( JSON.stringify(obj) );
		else
			console.log("Can't send: ", obj);
	},
	// Return true if the input event is destined for a DOM node that takes input
	_event_is_for_input: function(e) {
		return (e.target.tagName == "INPUT"
			|| (e.target.tagName == "BUTTON" && e.type == 'click')
			|| e.target.tagName == "TEXTAREA"
			) || (e.originalEvent && this._event_is_for_input(e.originalEvent));
	},
	_handle_key: function(e) {
		// Ignore navigation unless granted navigate role
		if (!this.roles.navigate)
			return true;
		// Ignore keys for input elements within the slides
		else if (this._event_is_for_input(e))