Learning JavaScript

Errata for Learning JavaScript

Submit your own errata for this product.


The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".

The following errata were submitted by our customers and approved as valid errors by the author or editor.

Color Key: Serious Technical Mistake Minor Technical Mistake Language or formatting error Typo Question Note Update



Version Location Description Submitted By Date Submitted Date Corrected
Safari Books Online
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3.2. The Assignment Statement

The text says: However, with the following, where variables are lined up with commas between them, the first variable is set and the second ends up undefined: var nValue1,nValue2 = 3; // nValue2 is undefined But, nValue2 will be equal to 3 and nValue1 will be undefined. So it should read: However, with the following, where variables are lined up with commas between them, the first variable is set and the first ends up undefined: var nValue1,nValue2 = 3; // nValue1 is undefined This: var nValue1,nValue2 = 3; // nValue2 is undefined document.writeln("<p>" + nValue1 + "</p>"); document.writeln("<p>" + nValue2 + "</p>"); Prints out this in Firefox and IE: undefined 3

Note from the Author or Editor:
Should read: However, with the following, where variables are lined up with commas between them, the second variable is set and the first ends up undefined: var nValue1,nValue2 = 3; // nValue1 is undefined

Steve Miller  Jan 15, 2009 
Safari Books Online
?
3.4.1. The Equality and Identity (String Equality) Operators

Code snippet used "If" that should be "if": var nValue = 3.0; var sValue = "3.0"; If (nValue == sValue) ... Should be: var nValue = 3.0; var sValue = "3.0"; if (nValue == sValue) ...

Note from the Author or Editor:
If (nValue == sValue) ... should be if (nValue == sValue) ...

Steve Miller  Jan 15, 2009 
Safari Books Online
?
4.3. Regular Expressions and RegExp

After Example 4-7 there is the following paragraph: The regular expression pattern used in Example 4-7 is a very handy expression to keep in mind. If you want to replace all occurrences of spaces in a string with dashes, regardless of what's following the spaces, use the pattern /\s+\g in the replace method, passing in the hyphen as the replacement character. /\s+\g should be /\s+/g

Steve Miller  Jan 15, 2009 
Safari Books Online
?
Example 8-5. Accessing text-based input fields from JavaScript

This line returns a null object in Firefox 3.0.5: document.getElementById("text4").value=strResults; It works in IE7. This appears work in both browsers: document.getElementById("someForm").text4.value=strResults;

Note from the Author or Editor:
The textarea in example 8-5 should have an id attribute assigned "text4", as well as name to use getElementById. The example in the examples file for the book have the id attribute and work correctly.

Steve Miller  Jan 22, 2009 
Safari Books Online
?
9.5. Adding and Controlling Timers

The following code: Var tmOut = setInterval("functionName", 5000); Should be: var tmOut = setInterval("functionName", 5000); Also, this is a minor note. Above this code is the syntax for the setTimeout function: var tmOut = setTimeout(func, 5000,"param1",param2,...,paramn); The double quotes around the 1st param1 appear to me to be unnecessary and confusing. I think it would read better as: var tmOut = setTimeout(func, 5000, param1, param2, ..., paramn); Thanks :) Steve

Note from the Author or Editor:
The double quotes around param1 in first code snippet are not necessary first word of third code snippet should read var, not Var

Steve Miller  Jan 23, 2009 
Safari Books Online
?
9.6.3. The navigator Object

I'm using Firefox version 3.0.5 and the text states: "The mimeTypes collection consists of mimeType objects, which have properties of description, type, and plugin." The words "description", "type", and "plugin" are bolded to denote the names of the properties. I checked using Firebug and the mimeType objects don't have a "plugin" property. There is a property named "enabledPlugin". Thanks :) Steve

Note from the Author or Editor:
The mimeType object has an enabledPlugin property, not a plugin property

Steve Miller  Jan 23, 2009 
Safari Books Online
?
Example 12-4. Element positioning and movement with fly-ins

The follow style generates an error in Firefox 3.0.6: #div2 { background-color: #ff0; color: #; The error: Warning: Expected color but found '#'. Error in parsing value for property 'color'. Declaration dropped. Source File: http://burningbird.net/lj2/ch12-04.html Line: 30 The Safari version has an extra 's' after the div3. This isn't on the on-line example: <div id="div3"> <p>Red block that has fixed positioning.</p>s

Note from the Author or Editor:
Example 12-4, page 272, CSS setting for #div2 should be: color: #000; Not color: #;

Steve Miller  Feb 09, 2009 
Safari Books Online
?
Example 15-3. Client application modified to work with an XML response

If you select California and them Missouri, California's cities remain in the options for Missouri. You can solve this by clearing the options in getCities() like so: // access city selection var citySelection = document.getElementById("citySelection"); citySelection.options.length = 0;

Note from the Author or Editor:
In example 15-3, add the following: citySelection.options.length = 0; After the line of code that reads: var citySelection = document.getElementById("citySelection");

Steve Miller  Feb 17, 2009 
Printed
Page 4
1st paragraph

"When you're visiting web pages and curious as to how..." s/b "When you're visiting web pages and ARE curious as to how..."

Anonymous    May 01, 2008
Printed
Page 4
Note

EMCA-262 should be ECMA-262 6) 2nd sentence under "First Look at..." heading; "All you need to do, at a minimum, is include HTML..." s/b [bc of parallel construction] "All you need to do, at a minimum, is TO include HTML..."

Anonymous    May 01, 2008
Other Digital Version
4
1st paragraph

"When you're visiting web pages and curious as to how..." s/b "When you're visiting web pages and ARE curious as to how..."

Anonymous    May 01, 2008
Other Digital Version
4
Note

EMCA-262 should be ECMA-262 6) 2nd sentence under "First Look at..." heading; "All you need to do, at a minimum, is include HTML..." s/b [bc of parallel construction] "All you need to do, at a minimum, is TO include HTML..."

Anonymous    May 01, 2008
Printed
Page 7
Example 1-1

<body onload="hello();"> is an error as the function hello is undefined. The example runs quite well without the onload="hello(); as the popup is generated as soon as the script is executed. It's a bit discouraging to find such a fundamental error in the first example!

Anonymous  Aug 28, 2008 
Printed
Page 7
2nd sentence in 1st paragraph

"If it doesn't, chances are that JavaScript is disabled in the browser, or,..., Javascript isn't supported." s/b [bc of parallel construction] "If it doesn't, chances are that JavaScript is disabled in the browser, or,..., THAT Javascript isn't supported."

Anonymous    May 01, 2008
Printed
Page 7
Example 1-1

Body tag in Example 1-1 should read: <body>

Anonymous    May 01, 2008
Other Digital Version
7
2nd sentence in 1st paragraph

"If it doesn't, chances are that JavaScript is disabled in the browser, or,..., Javascript isn't supported." s/b [bc of parallel construction] "If it doesn't, chances are that JavaScript is disabled in the browser, or,..., THAT Javascript isn't supported."

Anonymous    May 01, 2008
Other Digital Version
7
Example 1-1

Body tag in Example 1-1 should read: <body>

Anonymous    May 01, 2008
Printed
Page 9
Example 1-2

The line document..writeln(msg); should be: document.writeln(msg);

Anonymous    Jan 01, 2007
Printed
Page 11
Insert new section, just before the section titled "JavaScript Files"

header: Quirks versus Standard Mode and DOCTYPEs In the examples, the DOCTYPE used is XHTML 1.0 Transitional, even though all of the examples in the book are served as HTML, and with an .html extension. Which DOCTYPE used can influence how the page markup, CSS, and even JavaScript are interpreted. It's all based on a concept called 'quirks' mode, as compared to standards or strict mode. As browsers improve their support for markup and CSS standards, they also have to maintain backwards compatibility with pages created for older browsers. One way to do this is to render a page in such a way that it supports the browser's earlier 'quirky' behavior, in a mode called 'quirks mode'. Depending on the DOCTYPE, either a browser will render the page using an earlier interpretation of a specification, such as Internet Explorer's infamous CSS box model bug; or it will render it according to a standards-based viewpoint. The XHTML 1.0 Transitional DOCTYPE triggers standards mode for most browsers, even if the page itself isn't meant to be interpreted as an XHTML document. To actually be served up as XHTML, it needs to be passed to the browser with the XHTML MIME type, typically triggered if the extension is .xhtml. However, other modifications need to be made to the page, such as ensuring it is valid XHTML, and also modifying the opening html tag to include the tag namespace, the vocabulary where all the elements are defined: <html xmlns="http://www.w3.org/1999/xhtml"> The HTML 4.01 strict DOCTYPE can also trigger standards mode for most browsers, but I don't use it because the page won't validate if proper XML markup is used. For example, the meta tag in most of the examples uses a closed tag format: <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> This is invalid with the HTML 4.01 strict DOCTYPE. For that DOCTYPE, we need to use: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> Though HTML 4.01 is standard and still supported, we want to get into the habit of using proper XHTML markup as much as possible, even if the pages are still served up as HTML. This means less work when we are ready to make the step to serving pure XHTML documents, and eliminating all HTML. I mentioned earlier about how the DOCTYPE can impact on JavaScript. Well, in actuality it's how the document is served that can impact. Several of the examples use document.write or document.writeln. The reason I use these is that the example modifies the page. Later in the book, I introduce the Document Object Model (DOM) and demonstrate 'proper' methods of modifying the document. Until we reach that point, though, and in those cases where an alert box doesn't work well, the example uses document.write. Unfortunately, one of the drawbacks with using document.writeln is that it's not valid with a document that's served as XHTML. In fact, it won't work. The reason that documents rendered as XHTML don't allow document.write is that XHTML documents are considered to be valid XHTML, and won't display unless they are. If we can modify the documents with document.write, the browser has no way of knowing if the content being written to the page is valid or not. We could introduce 'bad' markup, which would render the guarantee of validity with XHTML. This same concern also exists with the use of innerHTML (which we'll look at later in the book). However, most browser do support this rather important property, and some browsers even validate the content being used to set innerHTML to ensure it's valid. For the rest of the chapter, the XHTML 1.0 Transitional DOCTYPE is used to ensure standards mode. Remember though that the namespace setting (http://www.w3.org/1999/xhtml), the extension (.xhtml), and the presence or not of document.write can impact on the document actually being served as XHTML. In the examples that can be downloaded for the book, multiple versions with different document types and extensions are provided for a couple of the examples, to demonstrate the variations discussed in this section. Each will have comments to discuss what changes were made so the document would serve correctly, as well as validate.

Anonymous   
Printed
Page 19
To validate, script section in Example 1-3 should be surrounded by

a CDATA section, as demonstrated in Example 1-2.

Anonymous   
Printed
Page 25
4th paragraph

This chapter covers the the three basic... should be This chapter covers the three basic...

Anonymous    May 01, 2008
Other Digital Version
25
4th paragraph

This chapter covers the the three basic... should be This chapter covers the three basic...

Anonymous    May 01, 2008
Printed
Page 26
The reserved word 'public' is listed twice; disregard the second occurrence.

Anonymous    May 01, 2008
Printed
Page 26
var-ident should be var_ident

Anonymous    May 01, 2008
Other Digital Version
26
The reserved word 'public' is listed twice; disregard the second occurrence.

Anonymous    May 01, 2008
Other Digital Version
26
var-ident should be var_ident

Anonymous    May 01, 2008
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Page 28
3rd example block

The comment that reads, // becomes 71 should be, // becomes "71" to indicate that the result is a string data type, rather than a number. (N.B. This syntax was used correctly on the preceding line.)

Note from the Author or Editor:
Change third example on page 28, second line, to: var strValueTwo = 4 + 3 + "1"; // becomes "71"

Jim Ward  Nov 27, 2010 
Printed
Page 28
validate-name should be validate_name

Anonymous    May 01, 2008
Printed
Page 28
The sentence that reads, "Though you can use the $, number, or

underscore to begin a variable, your best bet is to start with a letter." should read "Though you can use the $, letters, or underscore to begin a variable, your best bet is to start with a letter."

Anonymous    May 01, 2008
Other Digital Version
28
validate-name should be validate_name

Anonymous    May 01, 2008
Other Digital Version
28
The sentence that reads, "Though you can use the $, number, or

underscore to begin a variable, your best bet is to start with a letter." should read "Though you can use the $, letters, or underscore to begin a variable, your best bet is to start with a letter."

Anonymous    May 01, 2008
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Page 29
mid-page; The current link is

http://dojotoolkit.org/developer/StyleGuide

Anonymous    May 01, 2008
Other Digital Version
29
mid-page; The current link is

http://dojotoolkit.org/developer/StyleGuide

Anonymous    May 01, 2008
Printed
Page 31
Last two code samples

"embedded in the page" does not match code, which uses the string "embedded in page"

Anonymous   
Printed
Page 31
2nd paragraph from page bottom

Two problems here: (1) The notation "2e31", which appears twice in the first sentence, is incorrect. This notation as written means "2 times 10 to the 31st power", clearly not the author's intent. Rather, this should read "2", followed by "31" written as a superscript in each of its two instances here. (2) The upper range for the functions you reference is actually "2 to the 31st power minus one", 2**31-1, the integer representation of which is 2,147,483,647.

Note from the Author or Editor:
Page 31 remove notation in second to last paragraph: Though larger numbers are supported, some functions can only work with numbers in range of -2,147,483,648 to 2,147,483,648.

Jim Ward  Nov 27, 2010 
Printed
Page 31
2nd paragraph, 2nd sentence

"The first, global.js, concatenates it's own string, globally in globalPrint, to the message." "globally in globalPrint" should be in fixed font to demonstrate it is a literal string

Anonymous    May 01, 2008
Printed
Page 31
the second block of code, which begins with

message += " globally in globalPrint"; Since the variable is undefined, this generates an error in Firefox 2.x (though not necessarily other browsers, or earlier versions of Firefox). To prevent, use: if (typeof(message) != 'undefined') message += " globally in globalPrint";

Anonymous    May 01, 2008
Other Digital Version
31
2nd paragraph, 2nd sentence

"The first, global.js, concatenates it's own string, globally in globalPrint, to the message." "globally in globalPrint" should be in fixed font to demonstrate it is a literal string

Anonymous    May 01, 2008
Other Digital Version
31
the second block of code, which begins with

message += " globally in globalPrint"; Since the variable is undefined, this generates an error in Firefox 2.x (though not necessarily other browsers, or earlier versions of Firefox). To prevent, use: if (typeof(message) != 'undefined') message += " globally in globalPrint";

Anonymous    May 01, 2008
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Page 32
1st paragraph

"Hi, you were here" does not match the string in the code, which is "also accessed in global2Print"

Anonymous   
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Page 35
Example 1, in the file on O'Reilly's site (the print version is correct)

burningbird,net should be burningbird.net

Anonymous   
Printed
Page 35
3rd of 3 examples listed at the top of page

In this set of examples that begins on page 34, sValue is set to the empty string. This evaluates to false in JavaScript, not true. See the 2nd paragraph of the author's own quote of Simon Willison later in the page.

Note from the Author or Editor:
Commenter is correct. Third example on page 35 change to: if (sValue) // true if variable is both defined and given a value

Jim Ward  Nov 27, 2010 
Printed
Page 36
1st text paragraph

"...block in Example 2-1 is replaced..." should be "...block in Example 2-2 is replaced..."

Anonymous    May 01, 2008
Other Digital Version
36
1st text paragraph

"...block in Example 2-1 is replaced..." should be "...block in Example 2-2 is replaced..."

Anonymous    May 01, 2008
Printed
Page 38

Examples of floating point numbers in middle of page should read: (to O'Reilly, note about superscript): 0.3555 144.006 -2.3 44.1(2) // note that the 2 should be typographed as superscript 19.5(e-2) (which is equivalent to 19.5(-2)) // note that the e-2 and -2 should be superscript

Anonymous    May 01, 2008
Other Digital Version
38

Examples of floating point numbers in middle of page should read: (to O'Reilly, note about superscript): 0.3555 144.006 -2.3 44.1(2) // note that the 2 should be typographed as superscript 19.5(e-2) (which is equivalent to 19.5(-2)) // note that the e-2 and -2 should be superscript

Anonymous    May 01, 2008
Printed
Page 39

Sentence that reads: "You can convert strings or booleans to numbers..." should read "You can convert strings to numbers..."

Anonymous    May 01, 2008
Other Digital Version
39

Sentence that reads: "You can convert strings or booleans to numbers..." should read "You can convert strings to numbers..."

Anonymous    May 01, 2008
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Page 40
1st paragraph under "Null and Undefined"

more so then should be more so than

Anonymous    May 01, 2008
Other Digital Version
40
1st paragraph under "Null and Undefined"

more so then should be more so than

Anonymous    May 01, 2008
Printed
Page 41
1st line

sValue has not not been delcared should be sValue has not been declared

Anonymous    Jan 01, 2007
Printed
Page 43
Question 4

hexidecimal should be hexadecimal

Anonymous    May 01, 2008
Other Digital Version
43
Question 4

hexidecimal should be hexadecimal

Anonymous    May 01, 2008
Printed
Page 44
2nd code snippet at bottom of page

var bValue = true; var sValue = "this is also true" should end with a semi-colon, like - var bValue = true; var sValue = "this is also true";

Anonymous    May 01, 2008
Other Digital Version
44
2nd code snippet at bottom of page

var bValue = true; var sValue = "this is also true" should end with a semi-colon, like - var bValue = true; var sValue = "this is also true";

Anonymous    May 01, 2008
Printed
Page 46
The sentence starting with

"Usually, I should add,..." should read "Most complex JS libraries are 'usually' not more than a few hundred lines, because some of the newer Ajax libraries can be quite large."

Anonymous    May 01, 2008
Other Digital Version
46
The sentence starting with

"Usually, I should add,..." should read "Most complex JS libraries are 'usually' not more than a few hundred lines, because some of the newer Ajax libraries can be quite large."

Anonymous    May 01, 2008
Printed
Page 48

Sentence that reads: " - Represents a negative value" Should read " - Changes sign of value

Anonymous    May 01, 2008
Other Digital Version
48

Sentence that reads: " - Represents a negative value" Should read " - Changes sign of value

Anonymous    May 01, 2008
Printed
Page 50
4th block of text

we're typed out should be we've typed out

Anonymous    May 01, 2008
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Page 50
Under "Bitwise Operators"

there is excellent Boolean algebra reference should be there is an excellent Boolean algebra reference

Anonymous    May 01, 2008
Printed
Page 50
Code snippet

nValue += 3.0; should be nValue += 30;

Anonymous    May 01, 2008
Other Digital Version
50
4th block of text

we're typed out should be we've typed out

Anonymous    May 01, 2008
Other Digital Version
50
Under "Bitwise Operators"

there is excellent Boolean algebra reference should be there is an excellent Boolean algebra reference

Anonymous    May 01, 2008
Other Digital Version
50
Code snippet

nValue += 3.0; should be nValue += 30;

Anonymous    May 01, 2008
Printed
Page 51

The code snipped mid-page should read: var flag_A = 0x1; var flag_B = 0x2; var flag_C = 0x4; var flag_D = 0x8;

Anonymous    May 01, 2008
Other Digital Version
51

The code snipped mid-page should read: var flag_A = 0x1; var flag_B = 0x2; var flag_C = 0x4; var flag_D = 0x8;

Anonymous    May 01, 2008
Printed
Page 52
To validate, Example 3-1 needs a closing body tag.

Anonymous    May 01, 2008
Other Digital Version
52
To validate, Example 3-1 needs a closing body tag.

Anonymous    May 01, 2008
Printed
Page 58
The code for the switch statement should be

switch (stateCode) { case 'OR' : case 'MA' : case 'WI' : statePercentage = 0.5; taxPercentage = 3.5; break; case 'MO' : taxPercentage = 1.0; statePercentage = 1.5; break; case 'CA' : case 'NY' : case 'VT' : statePercentage = 2.6; taxPercentage = 4.5; break; case 'TX' : taxPercentage = 3.0; break; default : taxPercentage = 2.0; statePercentage = 2.3; }

Anonymous    May 01, 2008
Printed
Page 58
The line starting with

"In this instance, the case values associated with the block are separated from the others by commas, which means any of the three can match." should be "In this instance, the case values all resolve to the same block, which means any one of the three can match."

Anonymous    May 01, 2008
Other Digital Version
58
The code for the switch statement should be

switch (stateCode) { case 'OR' : case 'MA' : case 'WI' : statePercentage = 0.5; taxPercentage = 3.5; break; case 'MO' : taxPercentage = 1.0; statePercentage = 1.5; break; case 'CA' : case 'NY' : case 'VT' : statePercentage = 2.6; taxPercentage = 4.5; break; case 'TX' : taxPercentage = 3.0; break; default : taxPercentage = 2.0; statePercentage = 2.3; }

Anonymous    May 01, 2008
Other Digital Version
58
The line starting with

"In this instance, the case values associated with the block are separated from the others by commas, which means any of the three can match." should be "In this instance, the case values all resolve to the same block, which means any one of the three can match."

Anonymous    May 01, 2008
Printed
Page 59
Delete the sentence

It's identical in behavior to listing out the options, separated by commas.

Anonymous    May 01, 2008
Other Digital Version
59
Delete the sentence

It's identical in behavior to listing out the options, separated by commas.

Anonymous    May 01, 2008
Printed
Page 60
Change following sentence

In particular, the equality operator is implicitly used in the switch statement, which means that both of the following cases are applicable if the switch expression evaluates to "3.0": to In particular, the switch statement does not implicitly use an equality operator, which means that an expression of 3.0 evaluates true for the first case statement, false for the second:

Anonymous   
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Page 62

Code snippet should read: if (sValue <= 2.0) // true

Anonymous   
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Page 63
general format of ternary operator is

condition ? value if true : value if false;

Anonymous   
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Page 68
Example 3-8

eval ("document.writeln(document.." + docprop + ")"); should be eval ("document.writeln(document." + docprop + ")");

Anonymous   
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Page 71
2nd line of sample code, halfway down

holdAnwer should be holdAnswer

Anonymous   
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Page 75
Last Paragraph should read: "The substr method returns a substring

given a starting location and length of string. (example) (following example) The substring and slice methods return a substring given a starting and ending index.

Anonymous   
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Page 78
2nd paragraph

The following using the explicit option: should be The following uses the explicit option:

Anonymous   
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Page 78
All references to the regular expression '+s' and /+s/ should be

replaced by 's+' and /s+/ respectively.

Anonymous   
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Page 85

Example that reads: var newDt = new Date(1977,12,23); should be var newDt = new Date(1977,11,23);

Anonymous   
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Page 85

example of Date.UTC near the bottom that reads: var numMs = Date.UTC(1977,16,24,30,30,30) should read: var numMs = Date.UTC(1977,11,24,19,30,30,30)

Anonymous   
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Page 86

Last line of example code in page should read: <body> not </body> Also, the element directly after "</head>" should be "<body"> (not "</body>").

Anonymous   
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Page 93
Code snippet with

var removed = fruitArray.splice(2,2,'melon,banana'); should be var removed = fruitArray.splice(2,2,'melon','banana');

Anonymous   
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Page 93
In the second example block

the letters in legnth are transposed, and should be "length".

Anonymous   
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Page 94
The line

"The pop method removes the last element of the array, while the shift returns the first element." should read: "The pop method removes the last element of the array, while the shift removes the first element."

Anonymous   
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Page 94

second and third comments in Example 4-10 should read: // use shift to shift items off the array and then // now, same with unshift

Anonymous   
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Page 95
The sentence

The result of running this JavaScript is: Should be The result of running this JavaScript in our target browsers (all but IE 6.x and IE7, which don't return a length when using unshift) is:

Anonymous   
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Page 95
Example 4-10

document.writeln("new length is " + fifoNewArray.length );i should be document.writeln("new length is " + fifoNewArray.length ); (delete the 'i' at end of line)

Anonymous   
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Page 101
Sentence beginning with

"If a condition isn't met..." Should be "If a condition is met..."

Anonymous   
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Page 103

Code snippet that reads: var func = (params) { Should read var fun = function(params) {

Anonymous   
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Page 105

Sentence that reads: Returning to the Array methods, the filter method ensures that elements are not added to any element... Should read Returning to the Array methods, the filter method ensures that elements are not added to an array...

Anonymous   
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Page 125

The sentence that starts "When the input field is clicked..." should read "When the second input field is clicked (the first loses focus)..."

Anonymous   
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Page 127

The sentence that starts "This makes sense, when you consider that cascade means that the lowest..." should read "This makes sense, when you consider that cascade means the highest..."

Anonymous   
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Page 129
Example 6-7

add the following line as the first line in the function clickMe: evnt = evnt ? evnt : window.event;

Anonymous   
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Page 133
Last sentence in the second paragraph

The sentence In fact, this is probably one of these most common reasons for triggering an event directly: s/b In fact, this is probably one of the most common reasons for triggering an event directly:

Anonymous   
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Page 135
The sentence that starts with

"For the newer event systems, which use either the attachMethod or addEventListener..." Use "For newer event systems, which use either the attachEvent or addEventListener..."

Anonymous   
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Page 135
In code snippet

document.formname.addEventListener("submit", formFunction. false); The period should be a comma

Anonymous   
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Page 138

The reference to Example 4-9 should be Example 7-1

Anonymous   
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Page 138
Code snippet

opts[opts.length] = new Option("Option Four", "Opt 4"); Should be opts[opts.length] = new Option("Option Four", "Opt4");

Anonymous   
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Page 139
Example 7-2, line 11 (of the code)

window.addEventListener("load",setupEvents1,false); should be window.addEventListener("load",setupEvents,false);

Anonymous   
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Page 142
Example 7-3, line 21

} else if (document.someForm..attachEvent) { should be } else if (document.someForm.attachEvent) {

Anonymous   
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Page 143
The sentence that starts with

"Also in the example, DOM Level event handling..." Should be "Also in the example, DOM Level 2 event handling..."

Anonymous   
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Page 144
Example 7-4

Line: var theEvent = evnt ? evnt : window.event; Should be: evnt ? evnt : window.event

Anonymous   
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Page 146
Middle of page

You have this: function validateField(evnt) { var theEvent = evnt ? evnt : window.event; var target = evnt.target ? evnt.target : evnt.srcElement; var rgEx = /^\d{3}[-]?\d{2}[-]?\d{4}$/g; var OK = rgEx.exec(target.value); if (!OK) { alert("not a ssn"); } } Which does not work in Internet Explorer because you are referencing to the wrong object on var target = evnt.target ? evnt.target : evnt.srcElement; where evnt should be theEvent. See below function validateField(evnt) { var theEvent = evnt ? evnt : window.event; var theSrc = theEvent.target ? theEvent.target : theEvent.srcElement; var rgEx = /^\d{3}[-]?\d{2}[-]?\d{4}$/g; var OK = rgEx.exec(theSrc.value); if (!OK) { alert("not a ssn"); } } Can you please update the examples as well.

Anonymous  Sep 11, 2008 
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Page 153
numbered list 1/3 way down the page

Item 1 is written as "Select element event". This should be "second element event". Neither "First" (in item 2) nor "Document" (in item 3) should be capitalized, in order to correspond with the example 7-4 code.

Note from the Author or Editor:
Numbered list following code and first paragraph on page 153 change to 1. second element event 2. first document event 3. document event

Jim Ward  Nov 27, 2010 
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Page 175
Example 9-6 : 9th line

<p><a href="" onclick="parent.frameb.location.replace" should be <p><a href="" onclick="parent.frameb.location.replace No quote at the end of the line and the italic font should be removed.

Anonymous   
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Page 176
the sentence towards the bottom,

"The frametwo page has a link to another page called noway.htm..." should be: "The frametwo page has a link to another page called frame2.htm..."

Anonymous   
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Page 181
2nd paragraph

"color depths greater than the older eight pixels" should be "color depths greater than the older eight bits"

Anonymous   
Other Digital Version
193
8.1.2 Canceling an Event. 3rd paragraph

wrong method name the text reads: The returnValue property is equivalent to returning false explicitly in the function, and preventDefault prevents the default behavior based on the object and the event. For instance, with a click event on a submit button, calling ---->stopPropagate<--- and setting returnValue to false prevents the default form submission behavior. I think instead, you need to chance name stopPropagate to stopPropagation

Note from the Author or Editor:
Page 198 (print) para 1, change stopPropagate to stopPropagation

Anonymous  Jan 24, 2010 
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Page 199
the sentence that starts with

"To add text, the createTextNode factory object..." should read "To add text, the createTextNode factory method..."

Anonymous   
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Page 199
An end tag for the HEAD element should be added before the opening

BODY tag

Anonymous   
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Page 206
the sentence that starts with

"In the application, when the nodeValue property is not null..." should read "In the application, when the nodeValue property is null..."

Anonymous   
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Page 206
function randomColor()

Code should be used in randomColor to check if the digit returned is single digit, and if it is, alter the string to add a preceding zero, as in if (r.length == 1) r = "0" + r;

Anonymous   
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Page 218
the getDocumentById should be getElementById

Anonymous   
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Page 227
In Example 227, change the following two lines

opacity = opacity * 100; img.style.filter = "alpha(opacity:"+opacity+")"; To var opac = opacity * 100; img.style.filter = "alpha(opacity:"+opac+")";

Anonymous   
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Page 229
Example 11-5

Move the following line, included in the setup function, outside the setup function: document.onclick=changeOpacity; And change the getOpacity function to: if (this.obj.style.filter) { var filterString = this.obj.style.filter; var derivedVal = filterString.substring(filterString.indexOf(':')+1,filterString.indexOf(')')); return derivedVal / 100; } else { return this.obj.style.opacity; }

Anonymous   
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Page 233
4th paragraph, code snippet

"valueb". should read: "valueb",

Anonymous   
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Page 237
Example 11-7

Move the following line, included in the setup function, outside the setup function: document.onclick=changeOpacity; And change the getOpacity function to: if (this.obj.style.filter) { var filterString = this.obj.style.filter; var derivedVal = filterString.substring(filterString.indexOf(':')+1,filterString.indexOf(')')); return derivedVal / 100; } else { return this.obj.style.opacity; }

Anonymous   
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Page 246
3rd paragraph

Replace window.getComputedStyle with currentStyle and getComputedStyle with window.getComputedStyle. Instead of: "It tests, first, whether window.getComputedStyle is supported, and if not, tests for getComputedStyle." It should read: "It tests, first, whether currentStyle is supported, and if not, tests for window.getComputedStyle"

Anonymous   
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Page 246
In Example 12-2 change the line

return document.defaultView.getComputedStyle(obj,null).getPropertyValue(cssprop); to return window.getComputedStyle(obj,null).getPropertyValue(cssprop);

Anonymous   
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Page 253
The second sentence in the page that has

"...the top value, is greater than a value (200 + a value * the number of elements..." should read "...the top value, is greater than a value (100 + a value * the number of elements..."

Anonymous   
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Page 274
Add to the end of the paragraph at top of page, just before

Example 13-1: The order for the test of XMLHttpRequest needs to be reversed for IE 7 to work, or the overrideMimeType method removed, and PHP script adjusted accordingly, as IE7 does support XMLHttpRequest, but not overrideMimeType.

Anonymous   
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Last paragraph

In Example 14-6, I have a copy of Example 13-3 should be In Example 14-6, I have a copy of Example 13-4

Anonymous   
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First paragraph after code

The text says: "I've highlighted the lines of code where I've made changes based on adding in the logging functionality." But lines with changes are not highlighted.

Anonymous   
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Page 317
Add to end of answer for question 1

The variable ".someVariable" is also incorrect.

Anonymous   
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Page 317
Question 2

The dashes should be underscores for CURRENT-MONTH

Anonymous   
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Page 317
Question 4

var octNumber = parseInt(intNumber, 2); should be var octNumber = parseInt(intNumber, 8);

Anonymous   
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Page 318
change solution for Chapter 3 question 2 to

switch(val) { case 'one' : case 'two' : result = 'OK'; break; case 'three' : result = 'OK2'; break; default : result = 'NONE'; }

Anonymous   
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Page 319

Change first line of solution to: var regexp = /fun/g;

Anonymous   
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Page 323
In answer 5 at the top of the page, the code should be

var newWindow = window.open("http://help.html", "", "width=200,height=200,toolbar=no,status=no");

Anonymous