1. HTML Markup language - controls appearance and content of a document Javascripts Various HTML tags

2. Javascripts Client-side Script language - provides dynamic effects in response to events function change ( ) { alert (hello"); } functions defined in html head <input type=button value="pressMe" onclick="change()" /> functions called on button click

3. client 1. requests URL for html page server 2. retrieves html page 3. sends html page to client 4. browser interprets html page & displays Typical html Request/Response cycle Files on server Tomcat Server

4. ....fn defns... function nameOfFunction ( ) {... } document.ImageTagName.src="FileName"........... Heading Skip line JS to redirect source of image Form tag JS Script tag inside HTM head tags JS Function defined........... Image tag Button & event...description... HyperLink tag Some Syntax