Cascading Style Sheets (CSS)

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  © 2007 Triune Group    Insight. Strategy. Performance.   Cascading Style Sheets (CSS)An Introduction Chris Poteet  © 2007 Triune Group    Insight. Strategy. Performance.   Definition ã Cascading Style Sheets (CSS) form thepresentation layer of the user interface. – Structure (XHTML) – Behavior (Client-Side Scripting) – Presentation (CSS) ã Tells the browser agent how  theelement is to be presented to the user.  © 2007 Triune Group    Insight. Strategy. Performance.   Why CSS? ã CSS removes the presentation attributes fromthe structure allowing reusability, ease of maintainability, and an interchangeablepresentation layer. ã HTML was never meant to be a presentationlanguage. Proprietary vendors have createdtags to add presentation to structure. – <font> – <b> – <i> ã CSS allows us to make global andinstantaneous changes easily.  © 2007 Triune Group    Insight. Strategy. Performance.   The Cascade ã The power of CSS is found in the “cascade”  which is the combination of the browser’s default styles, external stylesheets, embedded,inline, and even user-defined styles. ã The cascade sets priorities on the individual styles whicheffects inheritance.
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