a useful javascript merge object function

  merge: function(src, dest){
    var i, v, result = dest || {};

    for (i in src) {
      v = src[i];
      if (v && typeof(v) === 'object') {
        if (v.constructor === Array) {
          result[i] = this._.clone(v);
        } else if (v.constructor !== RegExp && !this._.isElement(v)) {
          result[i] = Flotr.merge(v, (dest ? dest[i] : undefined));
        } else {
          result[i] = v;
        }
      } else {
        result[i] = v;
      }
    }

    return result;
  },

 repleace Flotr.merge to merge.