However, to say such sites will never need any amendments is na??ve in the
extreme. Therefore, unless authoring for an internal corporate environment where everyone
uses exactly the same browser, designers must always ensure they thoroughly test
sites in a range of browsers.
Weeding out common errors
Testing in browsers isn??™t everything; in fact, you may find that your site fails to work for no
reason whatsoever, tear your hair out, and then find the problem lurking in your code
somewhere. With that in mind, you should either work with software that has built-in and
current validation tools (many have outdated tools, based on old versions of online equivalents),
or bookmark and regularly use the W3C??™s suite of online tools: the Markup
Validation Service (http://validator.w3.org/), CSS Validation Service (http://jigsaw.
w3.org/css-validator/), Feed Validation Service (http://validator.w3.org/feed/),
Link Checker (http://validator.w3.org/checklink), and others (www.w3.org/QA/Tools/)
as relevant.
THE ESSENTIAL GUIDE TO CSS AND HTML WEB DESIGN
348
Other useful online services include WDG Link Valet (www.htmlhelp.com/tools/valet/),
WDG HTML Validator (www.htmlhelp.com/tools/validator/), and Total Validator (www.
totalvalidator.com/). Accessibility-oriented services include HP??™s Color Contrast Verification
Tool (www.hp.com/hpinfo/abouthp/accessibility/webaccessibility/color_tool.html);
Etre??™s Colour Blindness Simulator (www.
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