text: L.Control.Attribution = L.Class.extend({
  	onAdd: function(map) {
  		this._container = L.DomUtil.create('div', 'leaflet-control-attribution');
  		L.DomEvent.disableClickPropagation(this._container);
  		this._map = map;
  		this._prefix = 'Powered by <a href="http://leaflet.cloudmade.com">Leaflet</a>';
  		this._attributions = {};
  		this._update();
  	},
  
  	getPosition: function() {
  		return L.Control.Position.BOTTOM_RIGHT;
  	},
  
  	getContainer: function() {
  		return this._container;
  	},
  
  	setPrefix: function(prefix) {
  		this._prefix = prefix;
  		this._update();
  	},
  
  	addAttribution: function(text) {
  		if (!text) return;
  		this._attributions[text] = true;
  		this._update();
  	},
  
  	removeAttribution: function(text) {
  		if (!text) return;
  		delete this._attributions[text];
  		this._update();
  	},
  
  	_update: function() {
  		if (!this._map) return;
  
  		var attribs = [];
  
  		for (var i in this._attributions) {
  			if (this._attributions.hasOwnProperty(i)) {
  				attribs.push(i);
  			}
  		}
  
  		var prefixAndAttribs = [];
  		if (this._prefix) {
  			prefixAndAttribs.push(this._prefix);
  		}
  		if (attribs.length) {
  			prefixAndAttribs.push(attribs.join(', '));
  		}
  
  		this._container.innerHTML = prefixAndAttribs.join(' &mdash; ');
  	}
  });