In this column we have introduced DOCJSLIB 3.0, an extension of DOCJSLIB 2.0. We have described in detail the new linked image, joining DOCJSLIB 2.0's clicked image model. We have shown you how a linked image is defined and how to call it from your application. We have explained the new library functions that deal with the window's width and height, as well as with the size of the scrolled portion of the page. We have introduced a first in a series of time-related functions. This time, it is a function that executes a programmer-supplied command every fixed time interval. We have shown you how to implement watermarks with DOCJSLIB 3.0. We have demonstrated that such an application may consists of one function definition and two lines of main code.

In this column you have learned:

• How to use the DOCJSLIB's linked image model's external view.
• How to use the DOCJSLIB's linked image model's internal view.
• How to use the DOCJSLIB's window and page scrolling functions.
• How to use DOCJSLIB's fixed-interval repetition function.
• How to use DOCJSLIB's findHighestZ function.
• How to use DOCJSLIB's vertical positioning function.
• How to use DOCJSLIB 3.0 for writing applications.
• How to build your watermarks application.

We have shown you the DOCJSLIB-compliant code for:

• Connect-Three board game: view it or run it.
• Pop-out Elements: view it or run it.
• Page Watermarks: view it or run it.