HTML

http://htmlhelp.com/tools/validator/doctype.html

one of my favourites:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

source: www.ianr.unl.edu/internet/mailto.html (dead link)

    * PLEASE NOTE: It is recommended that you use a process other than MailTo handle the e-mail process from your web site.
    * If you do use MailTo, please encode the included e-mail address(s) to reduce the spam for that address.
      One routine to assist encoding and e-mail address is available at: www.ianr.unl.edu/email/encode/ 

The MailTo command can do more than enter a single e-mail address in the "Send To" field while activating your e-mail program. It can also:
Feature	     	Syntax
Address message to multiple recipients		,   (comma separating e-mail addresses)
Add entry in the "Subject" field		subject=Subject Field Text
Add entry in the "Copy To" or "CC" field		cc=id@internet.node
Add entry in the "Blind Copy To" or "BCC" field		bcc=id@internet.node
Add entry in the "Body" field		body=Your message here
Within the body use "%0A" for a new line,
use "%0A%0A" for a new line preceded by a blank line (paragraph),

http://radeff.red/info/html/mailform.html

Pour faire un upload (téléchargement) d'un fichier vers le serveur:

#  the action attribute refers to a server-side script which is capable of handling submissions containing forms or, technically speaking, being in multipart/form-data  format; as explained below, don’t even dream about using mailto: URLs in action attributes, in this context or otherwise!
# it has the attribute method="post"
# it has the attribute enctype="multipart/form-data"
# it contains a field
<input type="file" name="somename" size="chars">

http://www.tizag.com/phpT/fileupload.php doc pour php

forms

Frames / iframes

<input type='image' src='bla.gif'>

www.ianr.unl.edu/internet/mailto.html dead

MailTo   Syntax
August 15, 2003

The MailTo command can do more than enter a single e-mail address in the "Send To" field while activating your e-mail program. It can also:
Feature	     	Syntax
Address message to multiple recipients		,   (comma separating e-mail addresses)
Add entry in the "Subject" field		?subject=Subject Field Text
Add entry in the "Copy To" or "CC" field		?&cc=id@internet.node
Add entry in the "Blind Copy To" or "BCC" field		?&bcc=id@internet.node
Add entry in the "Body" field		?&body=Your message here

Notes:
    " " (beginning and ending double quotes) are necessary if any spaces are used
    Use the ? (question mark) and only one "?", when providing any entry beyond e-mail address

    Some examples, with actual HTML Code included, follow:

    Simple MailTo 
    <a href="mailto:astark1@unl.edu">

    MailTo with Multiple Recipients 
    <a href="mailto:astark1@unl.edu,ASTARK1@UNL.EDU">

    MailTo with Subject 
    <a href="mailto:astark1@unl.edu?subject=Comments from MailTo Syntax Page">

    MailTo with a Copy 
    <a href="mailto:astark1@unl.edu?&cc=ASTARK1@UNL.EDU">

    MailTo with a Blind Copy 
    <a href="mailto:astark1@unl.edu?&bcc=ASTARK1@UNL.EDU">

    MailTo with message already started in Body 
    <a href="mailto:astark1@unl.edu?&body=I am having trouble finding information on ">

    MailTo with multiline message in Body 
    <a href="mailto:astark1@unl.edu?&body=The message's first line. &body=Second line. &body=Third Line. ">
    IMPORTANT NOTE: This feature will NOT work with all e-mail programs, in which case the body information appears as a single line.

    Features may be used in combination

    MailTo with Subject, One Recipient and Two Copies
    <a href="mailto:astark1@unl.edu?subject=MailTo Comments&cc=ASTARK1@UNL.EDU,id@internet.node">
    Remember to use only one ? (question mark), when providing multiple entries beyond e-mail address

<meta http-equiv="refresh" content="1;URL=erreur500.php">

http://radeff.red/info/html/rvauto.html pour envoyer un email avec des propositions de rendez-vous

http://radeff.red/info/html/chars.htm

<!--
#############################
#
# useful script from --;>
;<!--http://www.hut.fi/~tkarvine/pre-wrap-css3-mozilla-opera-ie.html
# to wrap long lines in ;<pre;>
#############################

 --;>
;<!--http://www.hut.fi/~tkarvine/pre-wrap-css3-mozilla-opera-ie.html to 
-->
;<style;>
pre {
 white-space: pre-wrap;       /* css-3 */
 white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
 white-space: -pre-wrap;      /* Opera 4-6 */
 white-space: -o-pre-wrap;    /* Opera 7 */
 word-wrap: break-word;       /* Internet Explorer 5.5+ */
}
;</style;>

FAQ: Pourquoi mes modifications stylistiques dans mon éditeur WYSIWYG ne sont pas visibles?

carbon, la librairie open-source d'IBM