1. JavaScript & Introduction to AJAX 2006.05.11 cooldavid@cdpa.nsysu.edu.twcooldavid@cdpa.nsysu.edu.tw

2. Introduction to JavaScript The most popular scripting language used in Web pages. Most web browser support it. But….  The function support and object definition differ between browsers and versions.  It’s not JAVA.

3. Introduction to JavaScript Where to write it:  In the HTML …  Or include it  At some web object’s action

4. Introduction to JavaScript Hello World!  Alert(“Hello world!!”); Debug friend  Alert(“Debug message.”);  Mark part of code you think might have problem.

5. Why do we need JavaScript? DHTML  Dynamically update the web page. Without reload the hole page. Data validation  Check user input data before sending. Do some work at client side  Some web based tool even application.

6. The reference documents Netscape  http://wp.netscape.com/eng/mozilla/3.0/handbook/jav ascript/ http://wp.netscape.com/eng/mozilla/3.0/handbook/jav ascript/ Resources listed by mozilla (ECMA)  http://www.mozilla.org/js/language/ http://www.mozilla.org/js/language/ MSDN (JScript)  http://msdn.microsoft.com/library/default.asp?url=/libr ary/en-us/script56/html/b7a0a54e-dfaa-4e41-bf25- bcaa43e601fb.asp http://msdn.microsoft.com/library/default.asp?url=/libr ary/en-us/script56/html/b7a0a54e-dfaa-4e41-bf25- bcaa43e601fb.asp

7. What’s AJAX? Asynchronous JavaScript And XML How it works?  Using XHTML(HTML), CSS, for marking up and styling information.  DOM?  Special Object: Mozilla: XMLHttpReques IE: ActiveXObject("Microsoft.XMLHTTP")  XML?