JavaScript Examples Bible - UserWorks Technologies

Note
Chapter 4 ✦ The Document and Body Objects (Chapter 18)
drawPage(“default”)
To satisfy the curiosity of those who want to change the color of a loaded document
on the fly, the preceding example includes a pair of buttons that set the color
properties of the current document. If you’re running browsers and versions capable
of this power (see Table 18-1), everything will look fine; but in other platforms
or earlier versions, you may lose the buttons and other document content behind
the color. You can still click and activate these items, but the color obscures them.
Unless you know for sure that users of your Web page use only browsers and
clients empowered for background color changes, do not change colors by setting
properties of an existing document.
anchors
If you are using Internet Explorer 3 for the Macintosh, you will experience some
difficulties with Listing 18-1. The script in the main document loses its connection
with the subwindow; it does not redraw the second window with other colors.
You can, however, change the colors in the main document. The significant flicker
you may experience is related to the way the Mac version redraws content after
changing colors.
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Example
In Listing 18-2, I append an extra script to Listing 17-1 (in Chapter 3 of this
book) to demonstrate how to extract the number of anchors in the document.
The document dynamically writes the number of anchors found in the document.
You will not likely ever need to reveal such information to users of your page, and
the document.anchors property is not one that you will call frequently. The object
model defines it automatically as a document property while defining actual anchor
objects.
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document.anchors