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• NAME
• SYNOPSIS
• DESCRIPTION
• AUTHORS
• REQUIRES
• SEEALSO

NAME

wml::des::preload - Preload Images

SYNOPSIS

 <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: --



SEEALSO
wml::std::tags(3)
HTML 3.2 <img> tag.