The icons below show that this site has been coded to w3c standards.

This shows that the xhtml has passed w3c standards.

What is XHTML? The Extensible HyperText Markup Language (XHTML(TM)) is a family of current and future document types and modules that reproduce, subset, and extend HTML, reformulated in XML. XHTML Family document types are all XML-based, and ultimately are designed to work in conjunction with XML-based user agents. XHTML is the successor of HTML, and a series of specifications has been developed for XHTML.

This shows that the css has passed w3c standards.

What is CSS ? Cascading Style Sheets, level 2 (CSS2) is a style sheet language that allows authors and users to attach style (eg, fonts, spacing, and aural cues) to structured documents (eg, HTML documents and XML applications). By separating the presentation style of documents from the content of documents, CSS2 simplifies Web authoring and site maintenance. CSS2 builds on CSS1 and, with very few exceptions, all valid CSS1 style sheets are valid CSS2 style sheets.