MSIE rapidly caught up with the scripting functionality and extended it in different directions. In the typically competitive style of the Microsoft company, JScript rapidly became the equal of the Netscape 4.0 browser. However, now it's the turn of Netscape to up the stakes again with the introduction of Netscape 6.0, although Microsoft has a new version of MSIE at the stage of beta testing.
The language continues to evolve and penetrate new markets and systems. The core language has been standardized and several bindings are also reasonably stable through the efforts of the W3C, but there is still much to be done to ensure the language operates consistently across browsers. Now that Netscape and MSIE are implementing the standards-based features in similar ways for the most part, the differences between the two browsers are being squeezed into more esoteric areas such as sidebars and visual transition filters. Events still have some way to go, and it will be a while before DOM-style control is completely supported. There are also several new DOM components in level 2 and extensions in level 3.