Internet Explorer JScript Versions
The previous chapters in the reference part of the book have covered every aspect of Dynamic HTML authoring that affects elements, objects, and styles—the pieces that are often visible on the page. The one part yet to be covered is the scripting glue that makes it possible to access and control the items detailed up to this point—the "D" of DHTML. This chapter covers the core scripting language features that apply to cross-browser application development. This means that VBScript, ActiveX controls, and Java classes accessible through LiveConnect are intentionally omitted here in favor of the core language that is widely deployed in every scriptable browser.
12.1. Internet Explorer JScript Versions
JScript.dll versions continued to progress so that different (and more powerful) versions came installed on each succeeding IE version. Except for Internet Explorer 3, which predates DHTML-capable browsers, the JScript engine version is of no more consequence than the browser version. Therefore, in the listings within this chapter, the versions shown for IE are the first browser versions that are guaranteed to have implemented the particular language item. For example, although the Array object made its debut in JScript.dll Version 2 (during the lifespan of IE 3), it is listed as starting in IE 4.
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