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Pertemuan 18 Programming Languages for E-Business/E-commerce

Pertemuan 18 Programming Languages for E-Business/E-commerce. Matakuliah : M0284/Teknologi & Infrastruktur E-Business Tahun : 2005 Versi : <<versi/revisi>>. Learning Objectives. Distinguish between the static and dynamic modes of a Web page

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Pertemuan 18 Programming Languages for E-Business/E-commerce

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  1. Pertemuan 18 Programming Languages forE-Business/E-commerce Matakuliah : M0284/Teknologi & Infrastruktur E-Business Tahun : 2005 Versi : <<versi/revisi>>

  2. Learning Objectives • Distinguish between the static and dynamic modes of a Web page • Define the current state of the practice in Web page composition • Practice with the most common events of DHTML • Describe how the choice of image format affects performance in the context of limited bandwidth • Have a brief overview of programming options • Understand the important trends coming in the near future • Comprehend the standardization effort of various associations

  3. Chapter Overview • Languages used on the WWW • Similarities and dissimilarities • Advantages and disadvantages • Understanding the newer technologies in the offing

  4. HTML editors • Many editors available, range of attributes starting from simple Windows Notepad

  5. Business should consider • Use of standards • Style sheets • Dynamic HTML • Support for the scripting language

  6. Features of HTML editors • Collaboration and site management • Database features (ODBC, email options) • Deployment features • Design features (JavaScript & VBScript support, easy integration with CSS1 and CSS2, DHTML) • Visual wizard for forms, tables and frames • Support for image composition and mapping • Pixel-precise positioning • Drag and drop support • Preview • Syntax checking • Site navigation overview

  7. HTML editing features • Customizable templates • HTML validation and cross XML compliance tool. • Search, replace, replace all features • Supports Java applets, ActiveX, CGI • Syntax coloring • In-built DHTML scripts or wizard • Import, view, play multi-media files (GIF, JPEG, BMP, WAV and MIDI)

  8. HTML editors • MS FrontPage (integration with Microsoft IIS and Windows NT platform) from Microsoft • HomeSite with WYSIWYN (what you see is what you need) from Macromedia/Allaire is very easy and intuitive • 1rst Page 2000 from evrSoft (a freeware) • XMetaL 2.0 and HoTMetaL PRO 6.0 from SoftQuad • HotDog Professional from Sausage Software • PageMill, GoLive from Adobe. GoLive provides websites with dynamic links. • Ultradev from Macromedia. Ultradev & Dreamweaver and Fireworks. Ultradev has all the best features required to build a fine site. • Barebones for Apple users.

  9. Advanced HTML and DHTML • Dynamic behavior of a web page can be created using many technologies, e.g. JavaScript, VBScript, Document Object Model (DOM), and Cascading Style Sheets (CSS). • The display of the web page can be changed after the page loads. • Use of CSS for a uniform look and feel of the whole website. • Event-driven animation can be interactive and interesting.

  10. Additional HTML tags • Tags <div> and <span> • Advisable to use <div> as a generic container. • Box can be placed anywhere in the page

  11. <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.0 Transitional //EN”> <HTML> <STYLE type = “text/css”> <!-- #pic1{ POSITION: absolute; Z-INDEX: 1; LEFT: 30px; TOP: 30px; Visibility: visible} -- > </STYLE> <BODY> <div id= pic1> <img src= “http://mis.mgmt.umb.edu/euni.gif” width= 100 height=50 alt= “ ” border = “0”> </div> </BODY> </HTML>

  12. DHTML contd. • Both absolute positioning and relative positioning are possible. • With DHTML, less data has to be downloaded, as there are no large bitmap files.

  13. Elements that DHTML can control • Ability to hide and unhide portions of pages. • Display attributes of style sheets (text, background, form field, images, frames, tables and paragraphs). • Animation effects, make them more interactive and engaging • Scroll bars, ticker objects

  14. Events • OnBlur • OnFocus • OnLoad • OnAbort • OnChange • OnClick • OnError • OnKeyDown

  15. Portable Document Format (PDF) • PDF writer and distiller • On any computer platform • (DOS, Mac, Unix, Windows) • Preserves the format and looks • Can’t be modified, tampered with if protected • PDF Reader available free of cost to any user. • FrameMaker and Illustrator are able to write PDF format. • Corel with WordPerfect can export to the original PDF format but cannot modify existing documents. • Can be setup as an add-in to MS Word

  16. Cascading Style Sheets (CSS) • More powerful • More flexible • Useful for designing consistent looking web pages, like templates • Designers will create style sheets and apply them to any web page. • Developers can define their own classes, and new HTML elements.

  17. CSS Fundamentals • Style sheets have a defined order of precedence • CSS1 – by W3C, a set of style sheets or statements that may determine how a given element is presented in a web page format, using Netscape and I.E. browsers.

  18. Advantages of CSS • Separation of style and layout of HTML files from their informational content. • Provides relative measurement for any size of monitor screen or resolution. • Avoid breaking existing pages because older browsers simply ignore style sheets. • Allow readers to influence the presentation of HTML documents. • Enable companies to implement a house look and feel on their site, promote branding. • Improve the printing of web documents instead of having unpredictable HTML transfer to paper. • Enable access to the web for people with disabilities (larger fonts, variation of colors)

  19. CSS2 • A newer standard proposed by W3C and agreed upon by the industry for richer and more accessible web pages. • See latest news: • http://www.w3.org/Style/CSS/#news • New features – sidebars, navigation scrollbars • Images can be layered • Control over table layout

  20. Useful features of CSS • Both absolute and relative measurements can be applied • Color control • Fonts and texts can be formatted • Position, alignment properties • Spacing and areas (which includes borders, margins, padding, width, height, float property and clear property).

  21. Example of a simple style  <html> <head> <title>Style sheet</title> <style type = “text/css”> <!-- body {background: #FFFFFF} A:link {color: #80FF00} A:visited {color: #FF00FF} H1 {font-size: 24pt; font-family: arial; color:blue} H2 {font-size: 18pt; font-family: braggadocio} H3 {font-size: 14pt; font-family: Desdemona} -- > </style> </head> <h1>this is heading 1 </h1> <h2>heading 2</h2> <h3>heading3</h3> </body> </html>

  22. Tools supporting DHTML and style sheets • GoLive • Dreamweaver and Ultradev • Netobjects Fusion

  23. Some Sharewares for creating style sheets • TopStyle • CoffeeCup StyleSheet Maker + + • Prime Style • Style Master

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