michael@0: Object.defineProperty(Object.prototype, 'x', { 
michael@0:     set: function() { evalcx('lazy'); } 
michael@0: });
michael@0: var obj = {};
michael@0: var prot = {};
michael@0: obj.__proto__ = prot;
michael@0: obj.watch("x", function (id, oldval, newval) {});
michael@0: for (var str in 'A') {
michael@0:     obj.x = 1;
michael@0: }