developer.mozilla.org/en-US/docs/Archive/Web/JavaScript/New_in_JavaScript/1.6
JavaScript 1.6
developer.mozilla.org/en-US/docs/Archive/Web/JavaScript/New_in_JavaScript/1.7
JavaScript 1.7
developer.mozilla.org/en-US/docs/Archive/Web/JavaScript/New_in_JavaScript/1.8
JavaScript 1.8