Use favelets to check validation and accessibility of your web pages.
Favelets provide you with a way to run short scripts embedded within bookmarked URLs; the script will act upon the page you currently have in your browser. Scripts are are invoked by choosing the bookmark from you bookmark or favourites menu. This is a powerful feature that you can put to good use when creating and validating your web pages.
You can use favelets for many things including:
- * Checking the accessibility of pages.
- * Validating HTML and CSS.
- * Resetting browser screen size (i.e. for checking how a page will look on a screen with a different resolution).
- * Displaying images on a page with their alt attributes.
- * Viewing meta data for a page.
And much much more.
Ian Lloyd has a good explanation of how to use favelets on his 'Accessibility-checking favelets' page at http://www.accessify.com/tools-and-wizards/accessibility-checking-favelets.asp
His tutorial is aimed at Windows users, but if you are a Mac user, or using another platform, I am confident you will be able to work out how to use them from his explanation.
Links
More useful favelets related to accessibility and validation can be found at:
http://validator.w3.org/favelets.html
http://tantek.com/favelets/
A search on Google for favelets will also lead you to a huge number of useful favelets.