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CSS Styles and Web Design EssayCascading Style Sheets (CSS) defines how hypertext mark-up spoken communication elements are to be displayed and in-short referred as CSS. It reassures the appearance of multiple hypertext mark-up language pages by just including one single external style tatter. For storing external style sheets CSS files (. css extension) are used. CSS-establish layouts along with table based layouts are used to manage the formatting of a web site. Cascading style sheets (CSS) make it easy to manage the formatting of a web site and it commode be used to control the appearance of objects on a page or throughout a site. It can be designed and redesigned, and can control the formatting of hundreds of pages, including fonts, link colors, margin settings and background images. It is widely supported by modern browsers and allows flexibility in positioning. CSS based layouts Keeps the hypertext mark-up language/text ratio at a low level thus decreasing load time and Allows the display of main content first while the graphics load afterwards. CSS to a fault avoid accessibility issues raised by table cells and the content flows logically without disruption. The three ways by which style can be added in hypertext markup language document are1. External style sheet 2. Internal style sheet (inside the head tag) 3. Inline style (inside an hypertext mark-up language element) In terms of priority when hypertext markup language document displays, it first looks for Inline style, than for internal style sheet (inside the head tag) and at last include External style sheet which is CSS. External style sheet (CSS) enables developer to change the appearance and layout of all the pages in their WebPages by just editing one single CSS file. Internal (embedded) style sheets are useful for managing single hypertext mark-up language page in which it is included and inline style sheet are used for managing some special formatting within the webpage.The Evolu tion of HTML Standards The evolution of HTML standards started from 1989, when Tim Berners-Lee invented the Web with HTML as its publishing language. In September 1991, Open discussion about HTML across the Internet begins. In 1992, HTML 1. 0 the first release of HTML to the world, was taken from Tim-Berners Lee original proposal. At this time not many people were involved in website creation and the language was very limited. In May 1994, HTML+ having some physical layout was shown at the first World Wide Web conference (W3C) that was held in Geneva. In July 1994, HTML specification for HTML 2. 0 was released.It included everything from HTML 1. 0 and added a few naked features and defined many core HTML features for the first time. It was HTML standard until January 1997. In March 1995, HTML 3. 0 published as an Internet Draft by a HTML working group, led by Dave Raggett. In 1996, HTML 3. 2 (wilbur) came after the end of the Browser Wars and became the official standard in January 1997. It had included the tags introduced by Netscape and Microsoft during Browser Wars. In December 1997, HTML 4. 0 (cougar) introduced with HTMLs new supporting presentational language, cascading style sheets and became the official standard in April 1998.HTML 4. 0 was revised and corrected and later on introduced as HTML 4. 01 in 1999. In January 2000, XHTML 1. 0, an XML version of HTML 4. 01, became joint standards along with HTML 4. 01. In XHTML 1. 0, there are not many new or deprecated tags and attributes but it was changed with a view of increased accessibility and functionality and a new set of coding rules. In 2001, XHTML 1. 1 with some modularization came. In 2002, XHTML 2. 0, which is more simplified and generalized standards, came into effect for WebPages. References CSS Tutorial available at http//www. w3schools.com/css/css_intro. asp accessed on 27 July 2007. Web Development Series formatting content, January 4, 2007 retrieved on 27 July 2007 from http//academictec h. doit. wisc. edu/ORFI/wds/index. htm Moller, A. Schwartzbach, M. L. 2006. HTML and Web Pages An Introduction to XML and Web Technologies, Addison-Wesley. Retrieved on 27 July 2007 from http//www. brics. dk/ixwt/html. pdf Shannon, R (n. d. ). The History of HTML Retrieved on 27 July 2007 from http//www. yourhtmlsource. com/starthere/historyofhtml. html http//www. w3. org/ accessed on 27 July 2007.