MACROMEDIA 38028779 - Macromedia Dreamweaver - Mac, Инструкция по использованию, Страница: 408 / 582

Chapter 17 408
About layers and HTML code
When you insert layers into your Web page, Dreamweaver inserts the HTML tag
for those layers in your code. You can set four different tags for your layers:
div
,
span
,
layer
, and
ilayer
.
div
and
span
are the most common tags and are
recommended for use so that the widest audience will be able to view your layers.
Both Internet Explorer 4.0 and Netscape Navigator 4.0 support layers created
using the
div
and
span
tags. Only Navigator 4.0 versions support layers created
with the
layer
and
ilayer
tags (Netscape discontinued support in later
browsers). Earlier versions of both browsers display the contents of a layer but do
not display the positioning.
By default, Dreamweaver creates layers with the
div
tag and inserts layer code at
the insertion point, or at the top of the page, just after the
body
tag. If you create
a nested layer, Dreamweaver inserts the code inside the tag that defines the parent
layer. To change the default tag, see “Setting Layers preferences” on page 412.
The following is sample HTML code for a single layer (as it would look in
Dreamweaver):
<div id="Layer1" style="position:absolute; visibility:inherit;
width:200px; height:115px; z-index:1">
</div>
The following is sample HTML code for a nested layer (as it would look in
Dreamweaver):
<div id="Parent" style="position:absolute; left:56px; top:54px;
width:124px; height:158px; z-index:1;">
Content inside the parent layer.
<div id="Nested" style="position:absolute; left:97px; top:114px;
width:54px; height:69px; z-index:1;">
Content inside the nested layer.
</div>
</div>
You can set properties for positioning the layers on your page. These properties
include left and top (
x and y coordinates, respectively), z -index (also called the
stacking order), and visibility. For more information, see “Setting layer properties”
on page 417.