Website development describes the creation or redesign of a Web site’s appearance, navigation and content. This involves programming or use of an html editor (such as Dreamweaver or FrontPage) for the purpose of creating the code that comprises a Web site.
Programming lanaguages such as PHP, Perl and SSI are used to add features to the website to enhance HTML.
Interactive web sites can be built using databases such as MySQL.
It is important to check with your web hosting provider to find out what programming tools they make available.
The W3C Markup Validation Service is a free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other standards.
W3C CSS Validation Service; a free service that checks Cascading Style Sheets (CSS) in (X)HTML documents or standalone for conformance to W3C recommendations.
The World Wide Web Consortium (W3C) develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential. W3C is a forum for information, commerce, communication, and collective understanding.