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  4823 
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*****@stanfo rd.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 <buttonelemen t, 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.infosystem s. 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*****@codesm iths.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.infosystem s.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.infosystem s.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) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Jim Jewett |
last post by:
Normally, I expect a subclass to act in a manner consistent
with its Base classes. In particular, I don't expect to
*lose* any functionality, unless that was the whole point of
the subclass. (e.g., a security-restricted version, or an
interface implementation that doesn't require a filesystem.)
One (common?) exception seems to occur in initialization. I
understand stripping out arguments that your subclass explicitly
handles or...
|
by: Max M |
last post by:
# -*- coding: latin-1 -*-
"""
I subclass datetime and timedelta
>>> dt = myDatetime(1970,1,1)
>>> type(dt)
<class 'dtime.myDatetime'>
|
by: David Coffin |
last post by:
I'd like to subclass int to support list access, treating the integer
as if it were a list of bits.
Assigning bits to particular indices involves changing the value of
the integer itself, but changing 'self' obviously just alters the
value of that local variable.
Is there some way for me to change the value of the BitSequence
object itself? I've also tried wrapping and delegating using
__getattr__, but I couldn't figure out how to handle...
|
by: Mark Harrison |
last post by:
Is there a way to do something equivalent to "import * from self"?
Perhaps I'm doing something wrong, but I'm having a headache
when dealing with class instance data, forgetting to always
put the "self." prefix
For example, in my brain I'm thinking:
optc,args=getopt.getopt(args,cmdopts, cmdopts)
but I'm having to type:
|
by: Andrew Robert |
last post by:
Hi Everyone,
I am having a problem with a class and hope you can help.
When I try to use the class listed below, I get the statement that self
is not defined.
test=TriggerMessage(data)
var = test.decode(self.qname)
| | |
by: Peter Maas |
last post by:
The Python FAQ 1.4.5 gives 3 reasons for explicit self (condensed version):
1. Instance variables can be easily distinguished from local variables.
2. A method from a particular class can be called as
baseclass.methodname(self, <argument list>).
3. No need for declarations to disambiguate assignments to local/instance
variables.
|
by: braver |
last post by:
Is there any trick to get rid of having to type the annoying,
character-eating "self." prefix everywhere in a class? Sometimes I
avoid OO just not to deal with its verbosity. In fact, I try to use
Ruby anywhere speed is not crucial especially for @ prefix is better-
looking than self.
But things grow -- is there any metaprogramming tricks or whatnot we
can throw on the self?
Cheers,
|
by: Bart Kastermans |
last post by:
I am playing with some trees. In one of the procedures I wrote
for this I am trying to change self to a different tree. A tree
here has four members (val/type/left/right). I found that self = SS
does not work; I have to write self.val = SS.val and the same for
the other members (as shown below). Is there a better way to do this?
In the below self is part of a parse tree, F is the parse tree of a
function f with argument x. If a node...
|
by: lpyth |
last post by:
class abc:
def __init__(self,x,y,z):
self.x = x
self.y = y
self.z = z
def add(self):
c = self.x + self.y + self.z
|
by: Aaron Gray |
last post by:
Regarding 'self' :-
if (self)
document.write( "self<br>");
if (self === window)
document.write( "self === window<br>");
else if (self == window)
document.write( "self == window<br>");
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
| | |
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| | |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |
