obj.js

(function (exports) {

var Obj = {
  
  support: {
    
    // checks if Object.defineProperty exists and works as expected (not the case in IE8)
    'define_prop' : (function () {
      try {
        return return '_' in Object.defineProperty({}, '_', {});
      } catch (e) {
        return false;
      }
    })()
    
  }
  
};

// use Object.defineProperty if available, otherwise use a basic shim
var define_prop = Obj.support.define_prop
    ? Object.defineProperty
    : function(obj, prop, desc) {
      obj[prop] = desc.value;
    }
;


exports.Obj = Obj;
})(this);