Datasheet

There are many more Ajax-enabled chat applications. For example, take a look at

http://treehouse.ofb.net/chat/?lang=en for another good one.

Crunch numbers with spreadsheets

More and more desktop-type applications are being migrated to Web, thanks to Ajax. One of the

latest is for spreadsheets, which you can now find in a number of places online.

For example, take a look at Num Sum, a free online spreadsheet that works just as a desktop ver-

sion would, at

http://numsum.com/spreadsheet/new. You can see Num Sum at work in

Figure 1.11.

FIGURE 1.11

Num Sum is an online Ajax spreadsheet application.

Using Num Sum, you can create real spreadsheets, including the use of formulas, and save your

data on the Num Sum server. Using this application is nearly indistinguishable from a desktop ver-

sion, as you enter data and watch it being updated — all without a browser refresh.

Browse Amazon

Here’s a cute one: an application that lets you browse through the products for sale at Amazon.com.

This application lets you display everything in Amazon.com using a clickable tree that is updated

using Ajax. Just navigate to

http://lmap.co.nr/Amazon1.htm and click a node to open that

node and see the Amazon products, as shown in Figure 1.12.

NOTE

Fundamental Ajax

Part I

06_102633 ch01.qxp 2/23/07 9:44 PM Page 12