Navigator 4.0 supports an alternative syntax for positioning blocks of
HTML content; it extends HTML to include the <LAYER> tag.
You can specify the position and content of a layer of HTML inside a
<LAYER> tag in the body of the page -- there is no need to
pre-define the layer before you specify the content for it.
At the time of writing, the <LAYER> tag is specific to the
Netscape Navigator 4.0+ web browser.
Other browser may not handle layers defined with the <LAYER>
tag property.
The <LAYER> tag starts a layer,
and the </LAYER> ends the layer.
All the HTML content
between the opening and closing layer tag can be treated as a single
item of content that can be moved and altered in various ways.
<Layer top = 60
left = 100
width = 200
height = 100
bgcolor = "#ffcccc"
>
... HTML content ...
</Layer>
You can specify attributes for the layer such as
ID, TOP, LEFT, BGCOLOR, WIDTH, and HEIGHT.
(This is not a complete list of attributes.)
You can use inline JavaScript to dynamically change whether a layer is
visible or not, so that you can hide a layer and make it reappear again.
And you can position layers relative to each other, such as
having the top of one layer start just below the bottom of another.
Layers have a stacking order.
You can specify the "stacking order" (Z order) of layers as
relative to each other (Layer A is
immediately below Layer B) or you can specify numerical Z orders (the Z
value of Layer A is 1, the Z order of Layer B is 2.)
Layers can be transparent or opaque.
Underlying layers show through transparent layers, but not
through opaque ones.
You can specify background images and background colors.
If you set the background image or color, the layer will
not be transparent, and it will obscure any layers that lie below it.
