Can an HTML web page dynamically modify its own code?
(without resort to Java or any other non-HTML complexities)
That is, is there any provision in HTML such that a single
"Next" button on a main or index.html page will:
a) Change an image displayed on that page (say Picture_1.jpg)
to the next image in a sequence (say Picture_2.jpg), AND
b) "Reprogram" the Next button so that when its clicked again
it will replace Picture_2.jpg with Picture_3.jpg, and so on
thru a sequence of images.
Result could be a "one page slide show" with
* index.html and Picture_1, Picture_2, etc, being the ONLY files on
the web site; no other intermediate "linking" HTML pages.
* Picture_1, Picture_2, etc, being pure JPEG files -- no hidden HTML.
* Any individual picture immediately replaceable with newer version,
with no recoding
* Identical index pages will work with different picture sequences
provided each index page and sequence are in different folders
* No "gallery" with thumbnails of individual slides needed
This is not possible in pure HTML . . right?
12  4793 
AES wrote:
Can an HTML web page dynamically modify its own code?
(without resort to Java or any other non-HTML complexities)
No.
--
jmm (hyphen) list (at) sohnen-moe (dot) com
(Remove .AXSPAMGN for email)
AES wrote:
Can an HTML web page dynamically modify its own code?
(without resort to Java or any other non-HTML complexities)
HTML doesn't do anything dynamically. HTML only describes content. It
contains no instructions.
AES <si*****@stanford.eduwrites:
Can an HTML web page dynamically modify its own code?
No.
This is not possible in pure HTML . . right?
No, but add a bit of CSS and it more-or-less works. Sort of. On a good
day. http://www.dur.ac.uk/c.i.morris/htmlslides.html
Works in Gecko-based browsers, doesn't work in IE or Opera. I haven't
tested anything else. Since it requires styling of form controls and
uses the <buttonelement, it's perhaps not surprising it's incredibly
unreliable (and with serious accessibility problems even when it does
work).
You'd be better off with a server-side image gallery, optionally (and
it probably isn't worth it) with support for Javascript to let you
avoid full-page reloads.
--
Chris
AES wrote:
Can an HTML web page dynamically modify its own code?
No, you'll need JavaScript and a DOM.
Also don't think about "modifying its own code". The HTML code is
supplied from the server to the client by HTTP, then parsed into the
DOM and rendered onto the display. After this the code should be
thought of as not being of further interest. Instead you should modify
the DOM, using a different set of JavaScript methods.
You _can_ "modify the HTML code" using document.write() and similar
JavaScript functions. This is an obsolete technique though and causes
all sorts of problems, particularly if you want to work with XMl in the
future. So don't learn to do it this way, learn to do it through the
DOM.
Andy Dingley wrote:
AES wrote:
>Can an HTML web page dynamically modify its own code?
No, you'll need JavaScript and a DOM.
Also don't think about "modifying its own code". The HTML code is
supplied from the server to the client by HTTP, then parsed into the
DOM and rendered onto the display. After this the code should be
thought of as not being of further interest. Instead you should modify
the DOM, using a different set of JavaScript methods.
You don't modify the DOM. The Document Object Model is the model used
for representing the document, and any modifications to it are by
committee vote. What Javascript modifies is the document, via changes to
its DOM-based representation.
In our last episode,
<si***************************@news.stanford.edu >,
the lovely and talented AES
broadcast on comp.infosystems. www.authoring.html:
Can an HTML web page dynamically modify its own code?
No. HTML is not a programming language. It is markup.
--
Lars Eighner <http://larseighner.com/ <http://myspace.com/larseighner>
Consider what might be fertilizing the greener grass across the fence.
On 17 Aug 2006 10:07:29 -0700, "Andy Dingley" <di*****@codesmiths.com>
wrote:
>You _can_ "modify the HTML code" using document.write() and similar
JavaScript functions. This is an obsolete technique though and causes
all sorts of problems, particularly if you want to work with XMl in the
future. So don't learn to do it this way, learn to do it through the
DOM.
We're getting a little off-topic here, but I've not so far had any
problems using document.write(). I've mainly used it to write buttons
which won't do anything if Javascript is disabled, and which are thus
best not shown in that case. I can easily imagine it could give problems
if used to extrude ill-formed markup, but does it give problems
otherwise?
--
Stephen Poley http://www.xs4all.nl/~sbpoley/webmatters/
Lars Eighner wrote:
In our last episode,
<si***************************@news.stanford.edu >, the lovely and
talented AES broadcast on comp.infosystems.www.authoring.html:
>Can an HTML web page dynamically modify its own code?
No. HTML is not a programming language. It is markup.
What's the difference? XSLT is also "markup" - but XSLT contains
constructs such as for-loops and switch/case constructs.
So this is an artificial distinction.
--
Jack. http://www.jackpot.uk.net/
On 2006-08-17, Jack wrote:
Lars Eighner wrote:
>In our last episode,
<si***************************@news.stanford.edu> , the lovely and
talented AES broadcast on comp.infosystems.www.authoring.html:
>>Can an HTML web page dynamically modify its own code?
No. HTML is not a programming language. It is markup.
What's the difference? XSLT is also "markup" - but XSLT contains
constructs such as for-loops and switch/case constructs.
Then XSLT is a mark-up and programming language. HTML is only a
mark-up language.
So this is an artificial distinction.
--
Chris F.A. Johnson <http://cfaj.freeshell.org>
================================================== =================
Author:
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
In article <ec*******************@news.demon.co.uk>,
Jack <mr*********@nospam.jackpot.uk.netwrote:
No. HTML is not a programming language. It is markup.
What's the difference? XSLT is also "markup" - but XSLT contains
constructs such as for-loops and switch/case constructs.
Similarly with TeX.
Harlan Messinger wrote:
Instead you should modify
the DOM, using a different set of JavaScript methods.
You don't modify the DOM. The Document Object Model is the model used
for representing the document, and any modifications to it are by
committee vote. What Javascript modifies is the document, via changes to
its DOM-based representation.
Yukka ? Is that you ?
Anyway, it's JavaScript and classes are first-class objects (this is
what passes for OOP in JavaScript). You _can_ modify the DOM 8-)
Might I also suggest that it's Summer and you clearly need a holiday.
Andy Dingley wrote:
Harlan Messinger wrote:
>>Instead you should modify
the DOM, using a different set of JavaScript methods.
>You don't modify the DOM. The Document Object Model is the model used
for representing the document, and any modifications to it are by
committee vote. What Javascript modifies is the document, via changes to
its DOM-based representation.
Yukka ? Is that you ?
Because I think randomly substituting terms for each other makes
discussions more difficult to follow, and technical concepts harder to
grasp, particularly for the less experienced?
Perhaps you'd feel at home on the Marklar world: http://en.wikipedia.org/wiki/Fiction...h_Park#Marklar
:-P
>
Anyway, it's JavaScript and classes are first-class objects (this is
what passes for OOP in JavaScript). You _can_ modify the DOM 8-)
Well, OK, but then you're making it a *different* DOM, not the W3C DOM.
Might I also suggest that it's Summer and you clearly need a holiday.
Well, again, why? Do people who are rested not benefit from clarity? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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