JavaScript Examples Bible - UserWorks Technologies

Chapter 15 ✦ The NN4 Layer Object (Chapter 31)
layer.left:
layer.top:
ARTICLE I
Congress shall make no law respecting an establishment of religion, or
prohibiting the free exercise thereof; or abridging the freedom of speech, or of
the press; or the right of the people peaceably to assemble, and to petition the
government for a redress of grievances.
src
Compatibility ✓
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Example
Setting the layerObject.src property of a layer that is a member of a layer
family (that is, a family with at least one parent and one child) can be tricky business
if you’re not careful. Listing 31-7 presents a workspace for you to see how
changing the src property of outer and inner layers affects the scenery.
When you first load the document, one outer layer contains one inner layer (each
with a different background color). Control buttons on the page enable you to set
the layerObject.src property of each layer independently. Changes to the inner
layer content affect only that layer. Long content forces the inner layer to expand its
depth, but the inner layer’s view is automatically clipped by its parent layer.
Changing the outer layer content, however, removes the inner layer completely.
Code in the following listing shows one way to examine for the presence of a
particular layer before attempting to load new content in it. If the inner layer doesn’t
exist, the script creates a new layer on the fly to replace the original inner layer.
455
document.layerObject.src