Chapter 14

JavaScript and AJAX

Contents

14.1 Yikes! Programming?................ 147

14.2 What can JavaScript Do?............. 147

14.3 Try It: Changing Colors.............. 148

14.4 Things To Know................... 149

14.4.1 The DOM....................... 150

14.4.2 Camel Case...................... 150

14.4.3 Where Should JavaScript Go?............ 151

14.4.4 On... Triggers..................... 151

14.4.5 Is Java the Same Thing?............... 152

14.4.6 Indexed Content................... 153

14.5 Try It: More or Less (Hide and Reveal)..... 153

14.6 Try It: Make a Function.............. 154

14.7 Try It: Change the Class of an Element..... 155

Markup, styling, and action are the three main aspects of web design.

Markup (html) is pretty easy. It is the content creation part of web design.

Styling (css) is way fun. It is the artistic part of web design.

Action is what we will talk about now. And that means JavaScript and
AJAX.

JavaScriptgives you the ability to modify a page dynamically, right on the
user’s device, without reloading the page from a server somewhere.

146