NAME¶
wml::des::preload - Preload Images
SYNOPSIS¶
#use wml::des::preload
<preload src=<image filename> via=<trick>>
DESCRIPTION¶
This include file provides the "<preload>" tag which can be used
to preload images. Such preloading is usually done to speedup access for
following pages. Currently there are only a few tricks how this can be done.
The following combinations are currently supported:
- "src="anyimage "via=size"
- Preloads the image anyimage by using an "<img>" tag
with the attributes "width=1 height=1" which leads to the
loading of the image but only to a 1 pixel in display.
Advantage: Works for all browsers.
Disadvantage: This approach has the nasty side-effect of an occuring 1 pixel
in display because "width=0 height=0" does not work as expected
in most browsers (especially in Netscape 4.x). So, position your
"<preload>" tag somewhere it does not destroy the look and
feel of your page.
- "src="anyimage "via=js"
- Preloads the image anyimage by using a JavaScript snippet which
loads the image by declaring an unused "Image" object.
Advantage: Silently preloads the image without displaying anything.
Disadvantage: Only works for browsers with a JavaScript implementation and
only for those who support the "Image" object (currently NS/3,
NS/4, IE/4).
AUTHORS¶
Ralf S. Engelschall
rse@engelschall.com
www.engelschall.com
Denis Barbier
barbier@engelschall.com
REQUIRES¶
Internal: P1, P2
External: --
SEE ALSO¶
wml::std::
tags(3) HTML 3.2 "<img>" tag.