A search engine uses a “crawler”, which is a specialized piece of software, to read through your pages.
Accessibility: Web users who are visually impaired can use a piece of software known as a “screen reader” to access the information through sound rather than sight - it literally reads the page out to them, and it can do a much better job of helping people to find their way around your web page if it has a proper semantic structure, such as headings and paragraphs.
Would you prefer to update this information on every page of your site? I didn’t think so. Ease of maintenance: Following on from the last point, if your styling and layout information is only specified in one place, it means you only have to make updates in one place if you want to change your site’s appearance.To see an actual case of this in action, check out the A List Apart Slashdot rewrite article where the author took a very popular web site and re-wrote it in XHTML/CSS.
A much better alternative is to make the HTML files stripped down and neat, and include the styling and layout information just once in a separate CSS file.
5 JavaScript - adding behaviour to web pagesĬontinuing with Web Standards Curriculum, the basic building blocks of the Web - HTML, CSS and JavaScript have been introduced.