var config = new Class({
  Implements: Options,

  options: {
    input: $('config')
  },
  
  initialize: function(options) {    
    this.setOptions(options);  
    this.config = JSON.decode(this.options.input.get('text'));
  },
  
  get: function(what) {
    return this.config[what];
  }
});

config = new config();