better chain

Chain = new Class({

	$chains: {},

	getChain: function(key) {

		this.$chains[key] = this.$chains[key] || {

			$chain: [],

			chain: function(){
				this.getChain(key).$chain.extend(Array.flatten(arguments));
				return this;
			},

			callChain: function(){
				return (this.getChain(key).$chain.length) ? this.getChain(key).$chain.shift().apply(this, arguments) : false;
			},

			clearChain: function(){
				this.getChain(key).$chain.empty();
				return this;
			}

		};

		return this.$chains[key];

	}

});

(function(){

	var methods = {};

	['chain', 'callChain', 'clearChain'].each(function(method) {

		methods[method] = function(){
			return this.getChain('default')[method].apply(this, arguments);
		};
	
	});

	Chain.implement(methods);

})();