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The word dynamic implies movement and change. One of the major shortcomings of HTML has been its static nature. Often, web developers use other programming languages (such as Perl, ColdFusion, JavaScript, Java, and ActiveX controls) in conjunction with HTML to provide dynamic information to the web, because HTML alone can provide only static information. Furthermore, the capability to click on links to go to other pages also helps to give the impression that HTML can create dynamic Web pages. The capability to click on a hot link to go to another page may seem almost magical to the new Web user going online for the first time. DHTML uses layering and exact positioning of elements (among other things) in conjunction with cascading style sheets (CSSs), to create new effects that don’t require return trips to the web server. A person who creates a Web site can attach a style sheet to it so that the elements appear as he or she wants. A person viewing the site, however, may have his or her own style sheet in order to compensate for either technological shortcomings or human handicaps. These two style sheets can cascade, so that the viewer’s style sheet supersedes the author’s original one, enabling the viewer to get the most out of the site. By using cascading style sheets and DHTML together, Web authors can add a new level of interactivity and interest to their Web sites. You can make text float across the page, can make text colours change according to the movement of the mouse, can make a table of contents expand automatically, you get the idea. In addition, if a visitor to your Web site is using a browser that does not support DHTML, he or she will never know the difference. That is because well-written DHTML calmly reverts to compatibility with earlier browser versions. Your web site visitors need never know that you have used Dynamic HTML to create your site. Up-to-date visitors, however, will recognize that something different and interesting is going on at your site. And that may prove to be the incentive for them to come back time and again. Both Microsoft and Netscape have implementations of DHTML. Unfortunately they are not compatible with each other. Netscape can use Microsoft’s implantation, but Microsoft cannot use Netscape’s, because Netscape makes use of nonstandard approaches to DHTML. Extensible Markup Language (XML) The Extensible Markup Language (XML) is a subset of SGML that is completely described in this document. Its goal is to enable generic SGML to be served, receives, and processed on the Web in the way that is now possible with HTML. HML has been designed for ease of implantation and for interoperability with both SGML and HTML. Extensible Markup Language, abbreviated XML, describes a class of data objects called XML documents and partially describes the behaviour of computer programs which process them. XML is an application profile or restricted form of SGML, the Standard Generalized Markup Language. For more information on webdesign tips and outsource SEO link building please read all other articles published on a weekly basis.
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Dynamic HTML
