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5.11 Testing on Multiple Browser Versions
NN 2, IE 3
5.11.1 Problem
You want to test a page on as many browser
brands, versions, and operating systems as you can to verify
compatibility, but some browsers don't allow
multiple versions to be installed or run on one computer at the same
time.
5.11.2 Solution
The commercial software program
called Virtual PC by Connectix Corporation
(http://www.connectix.com) allows
you to create multiple instances of a Windows computer on a single
computer. Each instance runs inside its own window and does not
conflict with other instances. If you are a Windows-only user, this
means that you can create and run virtual computers for different
Windows and Internet Explorer versions. On a Macintosh, you can have
the same multiple-PC setup, as well as your regular Mac OS running at
the same time (see Figure 5-1). Since both the
virtual Windows machines and Mac can share common folders, you can
edit an HTML file where you like, and load the same file into many
browsers and versions at once.
Figure 5-1. Virtual PC running many Windows and IE versions simultaneously on a Macintosh
5.11.3 Discussion
As yet there is no Macintosh emulator for
Wintel hardware, so Virtual PC running on the Mac is a more versatile
environment than on the PC. Both are capable of creating Wintel-based
instances of Linux, and both have had the x86 version of Solaris 8
install successfully (although it is officially supported only on
Virtual PC for Windows).
To help you keep all the browser and OS versions straight, you can
create Windows instances that are essentially snapshots of history.
For example, one virtual machine can be running Windows 95, Internet
Explorer 3, and both Netscape 2 and 3; another instance might have IE
4 and NN 4 running under Windows 95; another instance might have the
same browsers, but under Windows 98. You can even add Opera browser
versions to appropriate virtual machines (e.g., Opera 6 with IE 6 and
Netscape 6).
