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JavaScript 2.0-The Complete Referen
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JavaScript 2.0-The Complete Referen
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Serrato, Darlene Hernandez, Michele
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First JavaScript document.write("
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In this case, the tag happens to s
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Ready start alert("First Script
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Script Hiding Most browsers tend to
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alert("Your JavaScript is on!
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Event Trigger Example A re
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Notice that the src attribu
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Figure 1-6: JavaScript console used
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Table 1-1: Browser Versions and Jav
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A scripting language is a language
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This is not a problem in itself. Th
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y a linebreak without causing an er
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Being weakly typed is both a blessi
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myArray[1] = 5; myArray[2] = "Thoma
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To compare objects, JavaScript prov
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} else { } x = x + 1; First, the co
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do { document.write(x); document.wr
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This code declares a function named
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document.write("This text is no
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*/ invoke it as follows: var y = sq
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Part II: Core Language Chapter 3: D
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throughout both the chapter and the
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The other important special value i
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Things get really messy if you work
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Close examination of the table of e
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document.write("Note how newlines (
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Note Some Netscape browsers do not
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Methods of objects are accessed in
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The typeof Operator If you‘re cur
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Number "NaN", "0", or the string re
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A variable‘s name should give som
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execute. This context contains the
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} function innerFunction() { } aler
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context, the interpreter would firs
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y = y - 1 is fine. But if you make
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Operators JavaScript supports a var
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There is one further wrinkle with t
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Table 4-3 shows the bitwise operato
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Table 4-5: Shorthand Assignment wit
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Comparison Operators A comparison e
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"thomas" >> "fritz" "aaaa" >> "a" "
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var a,b,c,d; a = (b=5, c=7, d=56);
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alert(myArray[2]); alert(myArray[3]
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Table 4-9: Precedence and Associati
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JavaScript supports a core set of s
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else if (expression2) statement or
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Figure 4-1: Logical expressions can
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else if (yourGrade == 'D') alert("N
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} case 'C': alert("You passed!"); c
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{ } // do something Last, an import
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document.write("Start the countdown
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} document.write("Outerloop: "+i+""
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The with statement indicates an obj
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alter program flow. A variety of lo
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Functions do not have to receive on
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Functions always return some form o
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document.write("In function fiddle
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} x = 7; document.write("x="+x+"");
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However, more likely, we purposeful
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document.write("Entering testFuncti
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"statements for function body"); As
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A similar kind of nameless function
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The result shown next demonstrates
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Note that this isn‘t a terribly r
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Using Functions Before concluding t
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} if (addTwo.arguments.length == 2)
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familiar to anyone who has programm
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creates String objects while the Ar
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The result is As you can see, the s
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Figure 6-1: Enumerating properties
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statement; Using with lets you refe
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Declare a function taking two argum
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Table 6-2: Properties and Methods C
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Notice that we named the method att
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If the way the robot object has bee
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Object-Oriented JavaScript Before j
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} this.hasJetpack = true; This exam
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function Robot(flying, action) { }
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var feature = guard.feature; var ca
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var firstArray = []; var secondArra
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The effect is as if no element had
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var myValues = new Array(); myValue
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stack.pop(); // ["first", 10] Retur
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Unlike with the push() and shift()
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It takes a variable number of argum
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If you want to be more succinct, yo
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} { } var last = this[this.length-1
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Table 7-1: Arguments to the Date()
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document.write("The current date :
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If you are not sure whether the par
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Table 7-2: Globally Available Metho
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Table 7-4: Methods Provided by the
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var s = new String(); var headline
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var s = "JavaScript" + " is" + " a"
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Table 7-6: HTML-Releated String Met
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This chapter is an introduction to
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expressions are designed to be very
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These characters are ^ and $, indic
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Table 8-2: Regular Expression Escap
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var pattern = /ab+c/; is read as
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var pattern = /[0-9]+/; This regula
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would match ―abcx7d‖ or ―abc_
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You could use the following regular
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document.writeln("result.lastIndex
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} // if we have a match, print info
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Table 8-7: Static Properties of the
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var stringwithdelimits = "10 / 3 /
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Non-capturing Parentheses JavaScrip
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addresses instead of domain names (
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1. The core JavaScript language (e.
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For the sake of brevity, some detai
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""); document.write("Page Colors");
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Figure 9-4: Some Document propertie
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using the traditional JavaScript
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The onclick attribute of the tag
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{ } var theirname=document.myForm.u
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Greeting: The previous examp
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Table 9-4: New Document Properties
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Netscape 4 Layer Example An example
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Figure 9-8: Internet Explorer 4 obj
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finds tag with id or name = myHeadi
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Table 9-7: Some New Properties for
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onclick="document.all['heading1'].s
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style, and content) to a programmin
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var feature; var version; for (i=0;
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The most important thing to think a
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Before moving on, we need to introd
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Table 10-2: DOM Node Properties DOM
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currentElement = currentElement.fir
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DOM Test Heading
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} } else alert("No parent"); break;
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onclick="currentElement=document.do
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Collection Description >document.an
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the necessary references. Let‘s s
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} if (node.parentNode) { } //-->> i
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} function doReplace() { } var repl
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Table 10-5: Text Node Manipulation
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onclick="temp = textNode.splitText(
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7
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-->> Simple DOM HTML Editor &n
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It would be easy enough to mod
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Table 10-6: CSS Property-to-DOM Pro
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"http://www.w3.org/TR/xhtml1/DTD/xh
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Style: normal italic oblique Wei
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onchange="theElement.style.fontSize
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Height: Width: &nbs
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theElement = document.getElementByI
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This is a paragraph This is a parag
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override them with local rules. Und
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} if (styleSheet.cssRules[0]) { } s
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There are a few things to study car
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var myWalker = document.createTreeW
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While the Traversal API is not wide
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adding content to the document. Bec
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inner/outer Tester This is a t
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>
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Figure 10-6: Using document.all[] a
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some consistency to the mad world t
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Table 11-2: Basic Events and Their
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ondblclick: onfocus: onkeydown:
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Browsers might support events othe
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onbeforedeactivate Fires just befor
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oncut Fires when selected content i
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ondrop Fires on a valid drop target
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onpropertychange Fires whenever a p
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page Non-standard Event Binding in
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this is to assign handlers after th
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Table 11-4: Effect of Returning fal
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One major difference between versio
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if you check your JavaScript consol
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To set up event capturing, use the
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keep tabs on what happened to an ev
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We may be in the gutter, but some o
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Table 11-9: Behavior of Internet Ex
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Table 11-9: Behavior of Internet Ex
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Preventing Bubbling You can stop ev
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The DOM2 Event model specification
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document.getElementById('myText').r
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Alt Key down? Control Key down? M
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The result of a click is shown in
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when the user activates the pull-do
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function killClicks(event) { } even
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-->> The killClick handler is regi
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startListen(); //-->> Current Nod
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Table 11-18 summarizes the major fe
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Part IV: Using JavaScript Chapter 1
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window.confirm(string); or simply c
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value that contains the value enter
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Opening and Closing Generic Windows
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in some browsers, while others may
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Table 12-1: Feature Parameter Value
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featurestring += "width="+document.
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Left: (IE) ScreenX: ScreenY: (Ne
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Figure 12-1: Simple window and its
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} } //-->> else customAlert("Bor
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} } myWindow.focus(); // Make the w
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windowHTML += ""; windowHTML += "An
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windowname is the name of the windo
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function moveIt() { if ((window.myW
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myWindow.moveBy(0,10);" />> X: Y:
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It is also possible to access parse
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5,4,3,2,1...BOOM Browser Self-De
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message = message.substring(1, mess
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Event Description onafterprint Even
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parent.frames[0].name would print o
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" var i = 0; msg += "Window: "+ win
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Two Frames within the naviga
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While inline frames seem to be a si
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window.onload = frameBuster; // -->
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Variables
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Back to previous page While Ja
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"http://www.w3.org/TR/xhtml1/DTD/xh
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Interested readers are enc
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Table 13-1: Document Properties Rel
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Unvisited Link Click to show active
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Location and Related Properties The
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str += "but remember the rules of X
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You also can read the target proper
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onclick="document.myform.field1.val
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} str += "border: "+theImage.border
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(document.all[10]) or by name (docu
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Table 13-4: Common DOM Properties f
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All other (
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Table 13-7: (X)HTML Elements Associ
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Table 13-7: (X)HTML Elements Associ
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} } var newText = document.createTe
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(X)HTML Table Inspector Test T
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Jet Packs Economy JP-3455E6
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above below border box hsides vside
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for (i = 0; i > document.writeln("R
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onclick="theTable.insertRow(documen
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} var colNumber = parseFloat(column
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} var numberRowsInTable = theTable.
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onclick="doCellModification(documen
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object. As with all document object
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Just as the Document contains a col
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} document.write("length: "+length+
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property. In short, it is most usef
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Remember that these buttons (i
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Table 14-5: Properties of the HTMLB
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Closely related to inputs of type "
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Common Field Properties
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Of course, the preceding script
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Checkboxes and radio buttons (―ra
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Yes: No: Maybe: does not, as it
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yes: no: maybe: onclick="a
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-->> Hidden Fields Hidden form f
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Trainer Friend Cook An HTMLSelectEl
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} //-->> alert(msg); Option 1 Op
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cities["Australia"] = ["Sydney", "M
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Brisbane The previous example il
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eserved keyword. We‘ll see anothe
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} for (i = 0; i
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Abstracting Form Validation The pr
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} if (/[^@]+@[^@]+/.test(s)) return
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if (!isInteger(s)) return false; va
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} { } alert("Email may not be empty
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} } { } case 'notblank': if (isEmpt
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Form Validation via Hidden Fields A
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} // Check for special characters l
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A final observation that escapes ma
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JavaScript can be used to turn disa
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Figure 14-4: Rendering of dynamic f
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} } return true; else { } window.st
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Widgets: @ 1.50 each Gadgets: @
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calculated fields. Also note that,
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Figure 15-1: Manipulating Image pro
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Complete: Height: Hspace: Nam
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} } } alt.value = i.alt; border.val
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"http://www.w3.org/TR/xhtml1/DTD/xh
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"http://www.w3.org/TR/xhtml1/DTD/xh
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{ } var i = new Image(); i.src = ur
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The complete working example is sho
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...Page content here... Give
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{ } var abouton = new Image(); abou
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Figure 15-2
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With CSS, you can go even furthe
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Absolutely positioned elements not
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color of the region to orange as se
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} } return(getElement(layerName, la
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} /* set the width of layer named l
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* return the object for the passed
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* set the x-coordinate of layer nam
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} else if (opera) else theLayer.sty
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} { } theLayer.document.write(conte
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z: Height: Width: />>
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Figure 15-3: Testing our cross-brow
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object, enabling control of the con
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} ("") : ("lightblue")); // IE can'
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DOM Level 2 style of event listener
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#mirror {border-style: solid; borde
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Notice how, in the preceding examp
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What's my style? Take 2 p { text-
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Figure 15-6: A simple DHTML page tr
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} if (clipleft A point of intere
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obots!');" 'If you like our domes,
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{ } currentX = getX('ufo'); if (cur
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} if (layerobject) else return(pars
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} /* move left until boundary */ fu
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We could modify the animation
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should not be placed within a form
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Select Navigation
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E-commerce ------------------------
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JavaScriptRef
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- Page 643 and 644: } } { alert("Main window went away.
- Page 645 and 646: Although the following code is writ
- Page 647 and 648: { // else move it 5 more pixels in
- Page 650 and 651: Figure 16-5: The slide-in menu in a
- Page 652 and 653: else if (document.all) // else if i
- Page 654 and 655: Bottom of the page As with all
- Page 656 and 657: application of this technology is t
- Page 658 and 659: When you assign a new cookie value
- Page 660 and 661: array else { // extract its value }
- Page 662 and 663: a user with the cookie ―username=
- Page 664 and 665: If the user doesn‘t have cookies
- Page 666 and 667: } } } value = document.cookie.subst
- Page 668 and 669: Where a calculator on the ENIAC is
- Page 670 and 671: Enter some text to store: When
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- Page 678 and 679: Error: No JavaScript Support E
- Page 680 and 681: // JS 1.5 features var version="1.
- Page 682 and 683: else alert("You have Flash!"); aler
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- Page 689: Under browsers like Internet Explor
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- Page 701 and 702: Your browser does not support Java!
- Page 703 and 704: } public void paint(Graphics myScre
- Page 705 and 706: Your browser does not support Java!
- Page 707 and 708: Plug-ins are persistent in the brow
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- Page 711 and 712: { for (var i=0; i
- Page 713 and 714: Suppose you have written some custo
- Page 715 and 716: } function changeFrame(i) { } if (!
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- Page 719 and 720: Whereas Java applets are downloaded
- Page 721 and 722: Browsers that do not understand wi
- Page 723 and 724: function play() { } if (!dataReady)
- Page 725 and 726: > // you can write an image in he
- Page 727 and 728: This chapter served as an introduct
- Page 729 and 730: } var img = new Image(); img.src =
- Page 731 and 732: The HTTP response code 204 ―No Co
- Page 733 and 734: { } // If we've already got a reque
- Page 735 and 736: User: Deagol (check online status)
- Page 737 and 738: One fundamental vehicle enabling se
- Page 739 and 740: { var params = "numstories=" Note O
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RPC Spellchecker
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+ } if (rpcResult === true) else al
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} var newScript = document.createEl
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Iframe RPC The Server Respon
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echo ""; ?>> In order to see this i
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The following example illustrates t
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The capability to update a page wit
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Figure 20-1: Well-formed XML under
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in which a document‘s logical str
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&cola; We could easily have just
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XSL Test Note In order to
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Whereas the preceding example is ra
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(123) 456-2222 fli@democompany.com
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You can reference the style
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directory {display: block;} employe
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MathML Below x + y 2 k +
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...HTML content... or you can refe
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Once you bind data into a document,
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We could further use the DOM proper
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{ var rootElement = xmldoc.document
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if (type == 1) { // open tag dump("
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-->> XML Document: Name: Title
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xmldoc.async = false; xmldoc.load("
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Name: Title: Phone: Email:
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Sales Executive (543) 555-5672 jone
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*/ var title = document.getElementB
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* append completed record to the do
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} //-->> /* append completed record
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A fake entry http://www.javascriptr
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a:hover {color:#FF9900;} #feedOutpu
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var itemURL = itemList[i].getElemen
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If you inspect the preceding exam
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Table 21-2: Relationship Between Mi
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Table 21-4: Proprietary Extensions
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of access to select one of the memb
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The result is shown in Figure 21-1.
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You must also indicate the comments
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Table 21-7: Some Proprietary Featur
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encountered. The browser generally
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Two problematic questions are how t
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HTML Applications HTML Applications
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} var fso, filehandle; //-->> fso =
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E, Elephant F, Fox G, Girl H, Hat T
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Figure 21-3: Data Binding example u
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Figure 21-5: Using dynamic properti
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arbitrary elements in a page. HTCs
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var originalColor; function activat
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Table 21-12: Some Default Behaviors
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Figure 21-6: Pop-up windows give yo
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There are numerous JScript capabili
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Note Interested readers can learn m
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Table 21-17: Components of Mozilla
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comes from a trusted source. Such c
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even if the page in that window was
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of incorporation, domain name owner
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Figure 22-2: Categorizing sites int
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The column of Table 22-3 indicating
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function doitagain() { } document.w
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escape(document.cookie); This scri
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Although some defensive programming
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Figure 23-1: Enabling notification
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Table 23-2: Common JavaScript Error
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if (debugging) alert("Returned from
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Figure 23-4: Using Error.stack to g
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} document.writeln(x); document.wri
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Figure 23-7: Enabling script debugg
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you can replace or suppress the err
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if (window.opener && !window.opener
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} return true; window.onerror = rep
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You can also create instances of th
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if (typeof(a) != "number" || typeof
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The appearance of a browser to supp
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efresher. We now turn our attention
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teksasliunescape(teks);document.wri
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Standard Version Description ECMASc
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Table A-7: Primitive JavaScript Dat
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Table A-11: Result of Type Conversi
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Object Description Array Provides a
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new Function(["arg1", ["arg2"], …
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Table A-21: Binary and Self-assignm
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A JavaScript implementation should
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} where statements is composed of z
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switch (expression) { } case val1:
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document.write(i+""); i++; } while
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Table A-27: Some Regular Expression
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Table A-32: Advanced Regular Expres
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Figure B-2: The traditional object
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Figure B-6: The Internet Explorer 4
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className String holding value of t
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eadyState Read-only string containi
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fireEvent(handler [, event]) Causes
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setExpression(property, expression
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Supported in IE4+, MOZ/N6+, DOM1. N
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This object has the following prope
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In Netscape 4.0-4.05 (JavaScript 1.
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ig, HTMLElement (Document Object) T
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constructor Reference to the constr
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caption, HTMLTableCaptionElement (D
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clipboardData (Proprietary Browser
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"move", "copyLink", "copyMove", "li
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setDate(dayOfMonth) Sets the day of
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Supported in Internet Explorer 4+,
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Document (Document Object) The Docu
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styleSheets[] Collection of styleSh
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Methods This object has only the me
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The message string defines the text
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properties ALT_MASK, CONTROL_MASK,
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setCapture([containerCapture]) Caus
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onblur Fires when an element loses
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Netscape Extended Events The follow
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onresizeend Fires when the user fin
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This object has the following metho
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Support Supported in Internet Explo
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Constructor This object cannot be i
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Individual entries in the history a
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scrolling String specifying whether
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"hidden", "image", and "button". Tr
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Despite being a tag found within a
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This object has the following prope
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Generally speaking, reserved words
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Index Symbols -- (decrement) operat
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ActiveXObject, 655-657, 772 addEven
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properties, 775 removing elements,
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ody object, HTMLBodyElement, 780-78
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dataTransfer, 788-789 external, 817
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passing composite types, 115-116 pa
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speed of writing, 724 value of comm
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overview of, 522 parsing, 525-526 r
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undefined, 58-60 dataTransfer objec
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ollovers, 498-499 sparing use of DH
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document objects, 761-769 abbr, 771
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optGroup, 851 option, 851-852 overv
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document tree navigation, browser d
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dynamic typing, 29-31, 155 Index_E
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special characters, 54-55 strings,
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defined, 297 overview of, 298 Event
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advantages/disadvantages, 16 functi
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properties, 417-419 form validation
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passing primitive types by value, 1
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HTML applications (HTA), 657-660, 6
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Radio, 856-857 Reset, 859-860 submi
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events, 814-817 hiding proprietary
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one-way communication with servers,
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Java applets accessing in JavaScrip
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keyboard masking, 453-454 keywords
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syntax, 737-738 variable declaratio
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methods common to all objects, 145-
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owser supporting, 134 javaEnabled(
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null data type conversion of, 734 d
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objects, 133-158 as associative arr
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comparison. see comparison operator
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IE security zones, 686-690 Mozilla,
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prototypes, extending Array objects
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string methods, 211-214 syntax, 748
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RPCs (remote procedure calls) callb
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ActiveXObject, 655-656 browser issu
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square brackets ([ ]), 93, 198 src
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functions made accessible by, 135 m
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logical operators, 740 loops, 746-7
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methods common to all objects, 145-
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Index_V V valid XML, 607-608 value,
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document property, 134 DOM methods
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eference book, 6 referencing elemen
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List of Figures Chapter 1: Introduc
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Figure 11-1: A click on the bold te
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Figure 20-7: XHTML with MathML and
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List of Tables Chapter 1: Introduct
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Table 10-3: DOM Level 0 Collections
- Page 1083 and 1084:
Table 15-2: Position-Related Proper
- Page 1085 and 1086:
Table A-13: Result of Type Conversi