CSS against the tables for the disposition: When Netscape Navigator 4 dominated the market of the hojeador, the popular solution available so that the designers present/display a Web page was using the tables. Often the simple fabric that it designs for a page would even require dozens of tables hierarchized in one a. Many groups of the fabric in Dreamweaver and other editors of the WYSIWYG still use this technique today. Navigator 4 didn’ aid CSS to a useful degree, so he of t simply wasn’ t used. After the dominant wars of the hojeador, and hojeadores collapsed such as Internet Explorer became more obedient W3C, the begun designers to give return towards the alternating CSS like a average to present/display its pages. The authors of the CSS say that the tables are due to only use for the standard datas, does not stop the disposition. Using the CSS instead of the tables also it returns the HTML to a margin of semantic benefit, that helps to bots and the motors of the search to understand what’ s that enters ignition a Web page. All the modern hojeadores of the Web support the CSS with diverse degrees of limitations. Nevertheless, one of the main questions against the CSS is that one trusting him exclusively, control essentially give ins then each hojeador has its own whims that give rise to a slightly diverse exhibition of the page. This is especially a problem then each hojeador does not support the same subgroup of rules of the CSS. For the designers who are used to the table-based dispositions, to develop Web site in the CSS one often becomes a question to try to fold what can be done with the tables, being taken some to find something uncomfortable of the design of the CSS due to the deficiency of the familiarity. For example, contemporarily he was something difficult to produce certain elements of the design, such as vertical positioning, and integral feet in a fabric design using absolute positions. With the abundance of accessible today in line of the resources of the CSS, although, fabric that it designs with reasonable adhesion a; ; “the standards imply little more than applying to CSS 2,1 or CSS 3 besides benefit correctly structured. At the moment the majority of the modern hojeadores has solved most of these whims in the representation of the CSS and this one has made many diverse dispositions of the possible CSS. Nevertheless, some people continue using the old woman hojeadores, and the designers need to have this present, and consider the attractive degradation of pages in less hojeadores. The remarkable person between these old woman hojeadores is more Internet Explorer 5 and 5,5, that, according to some designers of the fabric, is becoming the new Netscape 4 Navigator - a block that checks the World Wide Web to turn to the design of the CSS. Nevertheless, partnership W3 has made CSS jointly with XHTML the standard for the design of the fabric. It forms against the function: Some fabric revealers have a bottom of the graphical arts and can pay more attention to how a page sight that in view of other editions such as how the visitors are going to find the page via a Search Engine. Some could trust more the publicity than the motors to attract visitors to the site. In the other side of the edition, the consultants of the optimization of the Search Engine (SEOs) talk about to like of good the works of a technical and textual Web site: how much traffic generates via the motors of the search, and how much sales do, if it is assumed that cautious gift” t contributes to the sales. Consequently, the designers and the Cathedrals often finish for above in the conflicts where the designer wants more “pretty” the graphs, and the CATHEDRAL wants portions of “ugly” text, lists of the bullet, and word-rich connections of the text. One could maintain that this is a false dichotomy due to the possibility that a design of the fabric can integrate the two disciplines for a collaboration solution and sinérgica. Because some graphs respond to intentions of the communication besides the esthetic one, as on good the works of a site can depend on the graph designer’ ideas of the visual contact of s as well as the considerations of CATHEDRAL. Another problem when to use many graphs in a page it is that the direct transfer times can greatly be extended, irritating often the user. This one has become less than a problem whereas the Internet has been developed with Internet of high speed and the use of the vector graphics. This is a challenge of engineering to increase band width besides an artistic challenge to reduce to the minimum graphical and so large of the graphical file. This is a challenge in course because the increasing band width invites to increasing amounts of content. Design of accessible Web: Main article: accessibilityTo of the Web is accessible, the Web pages and the sites must adjust to certain principles of the accessibility. These can be grouped in the following main areas: it uses the margin of semantic benefit that provides a significant structure to the document (that is to say Web page) that the margin of semantic benefit also refers semantic to organize the structure of the Web page and to publish the description of the services of fabric therefore to be able to recognize them by other diverse services of fabric in Web pages. The standards for the semantic fabric pay attention by IEEE-use a language of valid margin of benefit that it adjusts to a published DTD or Scheme-it provides the equivalents of the text for any component of the not-text (e.g images, multiaverage) - the connections use hypertext that have sense when they are read outside context. (e.g avoids the” Chasque Here. “) - don’ the use of t mark-uses the CSS something that the tables of the HTML for the disposition. - she is author of the page so that when the source code is line by line read next to the user agents (such as readers of a screen) continue being intelligible. (Using the tables for the design of the fabric it will often give rise to the information that is not.) nevertheless, W3C allows an exception where the tables for the disposition any have sense when she is linearizada or an alternating version (perhaps linearizado) becomes available. The accessibility of the Web site also is changing whereas it is affected by the systems of management of Content that allow that the changes are realized to the Web pages without the necessity to obtain knowledge of programming of the language.