"His suggestions and technical corrections have make the book clearer and
more precise."
Should be:
"His suggestions and technical corrections have made the book clearer and
more precise."

total.innerHTML = ""
Should be:
total.innerHTML ="";

Superfluous comma after "Chapter 3".

'rather that as a method'
should be:
'rather than as a method'

"The facts that Javascript ..."
should be
"The fact that Javascript ..."

"If you have only one level of subclass, you can simplify the syntax..."

At the end of the last paragraph of 9.5.1, add the following:

Note however that this trick only works with shallow inheritance
hierarchies. If B is a subclass of A and C is a subclass of B, and
both B and C use this superclass trick, then when you create an
instance of C, this.superclass will refer to B(), and the B()
constructor will recurse infinitely. For anything other than simple
subclasses, use the construtor chaining technique shown in Example
9-3.

Again, note that this superclass property can only be used once
within an inheritance hierarchy. If a class and a subclass both use
this trick, it will cause infinite recursion.

var viewportWidth = window.innerWidth;
var viewportHeight = window.innerWidth;

Should be:

var viewportWidth = window.innerWidth;
var viewportHeight = window.innerHeight;

"documentElemnet" should be "documentElement"

"then the focus()" should be "than the focus()"

"opacity Specifies how opaque (or translucent) and element is."

"and" should be "an"

Although the IE event model provides event details in an Event
object, IE only passes an event object to handlers registered with
the non-standard <literal>attachEvent()</literal> method (described
below). Other event handlers are invoked with no arguments. Instead
of passing the Event object as an argument to the handler, IE makes
it available as the <literal>event</literal> property of the global
Window object.

An event handler registered with <literal>attachEvent()</literal>
will be invoked with a copy of the global
<literal>window.event</literal> event object.

"repuration" should be "reputation"

The examples in this section and the rest of the chapter are all
part of one larger module. They define utility functions in a
namespace (see Chapter 10) named <literal>HTTP</literal>. None of
the examples include the code to actually create this namespace,
however. The example download bundle includes a file named http.js
that includes this namespace-creation code, and you can simply add
the single line <literal>var HTTP = {};</literal> to the examples
shown here.

These utility functions are intended to be part of one large module,
and are all placed in a namespace (see Chapter 10) named XML. The
examples shown here do not include code to actually create this
namespace, however. The example download bundle includes a file
named xml.js that includes this namespace-creation code, and you
can simply add the single line <literal>var XML = {};</literal> to
the examples shown here.

"This provides a useful alternative to String.substring( ) and String.splice( )"
String.splice()
should be
String.slice()

Internet Explorer 5.0
should be
Internet Explorer 7.0