Page Monitors - Information Trapping: Real-Time Research on the Web - page 48

What 's a Bookmarklet?
a bookmarklet is like a bookmark, except it has a little bit of Javascript in it that enables it to do
things like query a search engine or connect to resources like WatchthatPage (Figure 3.3).
Figure 3.3
Bookmarklets can do
simple things like tell
you how recently a
page has been updated.
Bear in mind that if you have Javascript turned off in your browser, bookmarklets won't work.
For security reasons, make sure you stick to using bookmarklets that are offered by services you're
using, such as trackengine and WatchthatPage, or by legitimate Web sites, such as bookmarklets.
com, rather than ones that have been e-mailed to you or you've accessed in some other way.
WatchhatPage provides page alerts via e-mail. However, you can also view
recent page changes from the site, which is handy when you accidentally
delete some updates but still want to see them.
trackengine
Unlike WatchhatPage, TrackEngine (trackengine.com) is a paid service,
with some free functionality available. Registration with TrackEngine is
free, and requires a name, company name, email address, user name, pass-
word, country/time zone, and a terms-of-service agreement. You can moni-
tor up to ive sources before you need to pay a fee.
TrackEngine ofers a nity bookmarklet button you can add to your browser
toolbar. When you're suring the Internet and you ind a page you want to
monitor, you simply click the bookmarklet button on your toolbar, and that
page is automatically added to TrackEngine.