grungey object.isfrozen hack in tv4.js line 118

[kumarperla-gmail]

Please let me know what below code is doing?

// Grungey Object.isFrozen hack if (!Object.isFrozen) { Object.isFrozen = function (obj) { var key = "tv4_test_frozen_key"; while (obj.hasOwnProperty(key)) { key += Math.random(); } try { obj[key] = true; delete obj[key]; return false; } catch (e) { return true; } }; }