HTML / CSS

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Un arrière-plan extensible intelligent - Alsacreations

Certains sites affichent une (grande) image de fond qui s'adapte à toutes les dimensions de la fenêtre du navigateur, proportionnellement, sans la déformer . http://www.alsacreations.com/astuce/lire/1216-arriere-plan-background-extensible.html
To use native WebSockets in Firefox, the prefixed MozWebSocket should be used. However, Firefox 11 will support the IETF standard without the prefix.

HTML5 Please - Use the new and shiny responsibly

http://html5please.com/
http://billmill.org/static/canvastutorial/index.html In order to use this tutorial, you'll need to have a relatively recent version of Firefox , Safari , or Opera . You cannot use Internet Explorer, because Microsoft hss decided not to implement the element in it.

Canvas Tutorial - Introduction

http://wufoo.com/html5/

The Current State of HTML5 Forms · Wufoo

The :not() selector isn't specific to forms, but is useful for selectors like :not([type=submit]) for selecting all inputs other than submit buttons.
http://www.brunildo.org/test/Overflowxy2.html

overflow-x, overflow-y (CSS3 properties)

In all the following test cases the green box has fixed dimensions (80px × 80px, with padding 9px, border 10px.)

Learning To Use The :before And :after Pseudo-Elements In CSS - Smashing Magazine

If you’ve been keeping tabs on various Web design blogs, you’ve probably noticed that the :before and :after pseudo-elements have been getting quite a bit of attention in the front-end development scene — and for good reason . http://coding.smashingmagazine.com/2011/07/13/learning-to-use-the-before-and-after-pseudo-elements-in-css/