Queue.js

(function(){

this.Queue = new Class({

	Extends: Chain,

	Implements: Class.Binds,

	call: function(){
		if (this.busy || !this.$chain.length) return this;

		this.busy = true;
		this.callChain();
		return this;
	},

	complete: function(){
		this.busy = false;
		this.call();
		return this;
	}

});

}).call(this);