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Thanks Ok, now you have to ask yourself some questions about how you want your site to work, A) Client-side scripting B) Server-side scripting C) Both Client and Server side scripting Of these, A) has the most risks as anyone could damage it B) has the drawback of multiple trips to the server C) requires more work So...
go to a scripting site ( such as and get some basic form validation routines.
See Understanding Techniques for WCAG Success Criteria for important information about the usage of these informative techniques and how they relate to the normative WCAG 2.0 success criteria.
The Applicability section explains the scope of the technique, and the presence of techniques for a specific technology does not imply that the technology can be used in all situations to create content that meets WCAG 2.0.
Most of the internet pages are written in HTML and Extensible HTML language.
These are the languages commonly utilized in custom web style and documentation.
The objective of this technique is to avoid ambiguities in Web pages that often result from code that does not validate against formal specifications.
Each technology's mechanism to specify the technology and technology version is used, and the Web page is validated against the formal specification of that technology.
XHTML, SVG, SMIL and other XML-based documents reference a Document Type Definition (DTD) or other type of XML schema.Using the XML parser (not resolving external entities).