Head Rush Ajax

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ajax and dom utilities

You can use ajax.js by adding a <script> tag to the

<head> section of your web page’s HTML and referring to

the le’s name, like this:

<head>

<title>The New and Improved Break Neck Pizza</title>

<link rel=”stylesheet” type=”text/css” href=”breakneck.css” />

<script type=”text/javascript” src=”ajax.js”> </script>

<script type=”text/javascript” src=”pizza.js”> </script>

</head>

This is the <head> section of

an HTML page.

In this case, this HTML

refers to ajax.js, as well

as an application-specic

JavaScript le, pizza.js.

This space is really important... without it,

some browsers won’t load the JavaScript le

you refer to with the src attribute.

Using ajax.js

There’s nothing wrong with using an Ajax

toolkit, especially if the toolkit takes care of

lots of routine and repetitive tasks. That’s all

ajax.js really does: it takes code that you

need in every single Ajax application, and it

tucks it away in a le that you can use and

refer to over and over.

But, you shouldn’t just grab the coolest

looking toolkit you can nd, stick in a

<script> tag, and hope for the best. Open

up the JavaScript for the toolkit and gure

out what’s going on. After 400 pages of

asynchronous programming, that shouldn’t

be too much of a problem!

Don’t use what you don’t understand

Now tell me again why I shouldn’t use

one of those fancy Ajax toolkits I keep

seeing on the ...