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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-specic
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 ...