Chart = function(){
	return {
		base : 'http://chart.apis.google.com/chart'
		,url : function(args){
			var s = "";
			for(k in args){
				if(s) s += "&";
				else s = "?";
				s += k + "=" + args[k];
			}
			return this.base + s;
		}
	}
}();