If
you edit out the unit of measurement, the Web browser defaults to pixels.
Netscape developed two additional proprietary tags for using AP elements in its 4.x browser:
and . The primary difference between the two tags has to do with positioning:
The tag is used for absolute positioning, and the tag for relative positioning.
These tags are not supported in Navigator 6.0 or later; instead, Netscape??™s more recent browsers fully
support the CSS standard tags, and
.
NOTE NOTE
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Working with Divs and AP Elements 11
Positioning Measurement
The positioning of AP elements is determined by aligning elements on an x-axis and a y-axis. In CSS, the xaxis
(defined as Left in CSS syntax) begins at the left side of the page, and the y-axis (defined as Top in CSS
syntax) is measured from the top of the page down. As with many of the other CSS features, you have your
choice of measurement systems for Left and Top positioning. All measurements are given in Dreamweaver as
a number followed by the abbreviation of the measurement system (without any intervening spaces). The
measurement system options are as follows:
Unit Abbreviation Measurement
Pixels Px Relative to the screen
Points pt 1 pt = 1/72 in
Inches in 1 in = 2.
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