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Weekend MS CS Program Internet and Web Technologies. Dr. Roy Levow, Associate Chair & Professor Email: roy@cse.fau.edu Phone: 954-236-1170 Web: http://www.cse.fau.edu/~roy. COT 5930 Web Project Development - Ajax. Lesson Plan. Introduction to Ajax Constituent Technologies XHTML CSS

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Weekend MS CS Program Internet and Web Technologies


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    1. Weekend MS CS ProgramInternet and Web Technologies Dr. Roy Levow, Associate Chair & Professor Email: roy@cse.fau.edu Phone: 954-236-1170 Web: http://www.cse.fau.edu/~roy COT 5930 Web Project Development - Ajax

    2. Lesson Plan • Introduction to Ajax • Constituent Technologies • XHTML • CSS • JavaScript • DOM • XML, XLS, XSLT • XMLHttpRequest • Simple Ajax Examples

    3. Ajax • Asynchronous JavaScript And XML • Provides a framework for the development of web pages that are • Interactive • Highly dynamic • Small transfers that update current page provide faster, smoother response

    4. Ajax Site Example • Google Suggest (Beta)http://www.google.com/webhp?complete=1&hl=en • Google Mapshttp://maps.google.com/ • Gmailhttp://gmail.google.com/ • Google Page Creator (Beta)http://pages.google.com/

    5. Ajax vs Classic Page Loads

    6. Classic Synchronous Loads

    7. Ajax Asynchronous Loads

    8. Pros and Cons of Ajax: Pros • Interactivity • Achieved by direct manipulation of DOM • Quick updates using incremental data loads • Portability • Open standards • JavaScript is supported by most current browsers

    9. Pros and Cons of Ajax: Cons • Inefficiency • Interpreted code • Overhead of XML transfer (larger files) • Portability • Requires JavaScript • Also requires ActiveX on IE • Inconsistent rendering • Issues with response to Back button • Accessibility issues

    10. Alternative Technologies • Macromedia Flash • Highly interactive • Prepackaged “movies” • Requires plugin • Java Web Start • Java application interacts between client and server • Microsoft .NET

    11. Ajax Component Technologies • XHTML • CSS • JavaScript • Document Object Model (DOM) • XML and XSLT • XMLHttpRequest

    12. Ajax Design Principles • Highly interactive • Smooth responses • Separation of • Data • Presentation • Program logic

    13. Ajax Tools • A variety and growing number of tools have been developed to support Ajax technology • Provide consistent development environment • Hide XML and XMLHttpRequest complexity • Ruby on Rails / Ajax on Rails • Eclipse Ajax Tool Framework

    14. Video Introduction • Introduction to Ajax video from text • what_is_ajax.mov

    15. XHTML • Provides basis for presentation of web pages • Tutorial and Standard at W3Schools

    16. Cascading Style Sheets (CSS) • Provide for separation of format from content • Tutorial and Standard at W3Schools

    17. Domain Object Model (DOM) • Dynamic access to elements of web page in browser • Support for XHTML, XML, CSS • Introduction to DOM • W3 SchoolsXML DOM Tutorial • Using DOM for DHTML • Ryan's DHTML Tutorial, Part 4

    18. XML • Extensible Markup Language • Provides basic structure for representation of data and other structured documents • Tutorial and Standard at W3Schools • Review of XML Namespaces

    19. XSL • Extensible Stylesheet Language • More than just stylesheets • For application to XML • XSLT for transforming XML documents (into XHTLM)W3 Schools XSLT Tutorial • XPath for selecting parts of an XML document W3 Schools XPath Tutorial

    20. References • Wikipedia – Ajax programminghttp://en.wikipedia.org/wiki/AJAX_%28programming%29 • Ajax information and tutorials at Fiamingadevhttp://dev.fiaminga.com/ • Ajax Bloghttp://ajaxblog.com/ • AjaxLessons.comhttp://www.ajaxlessons.com/ • W3Schools tutorials and standardshttp://www.w3schools.org/