Recognizes changes in content Even if you jump from one chapter to another, via a link within the content area, the Applet recognizes it and the selected item changes. To speed up the loading time, you can now split the tree into subtrees, each contained in a separate script file. This is especially useful for large tables of contents, e.g. imagine a tree implementing the entire Yahoo structure. Can call JavaScript functions Instead of opening another document, you can call a JavaScript function and do whatever you want when an item in the tree is selected. A special TOC version is available for this purpose, as the feature is only supported by Netscape 3.0x and 4.0x, and the Windows version of Microsoft Internet Explorer 4.0x.
Communication works across frames too.
Updates multiple frames You can associate multiple frame updates with one item. The Applet requires just 42kB to 58kB, depending on the features you use.