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CHAPTER 10 ■ SCRIPTING BOM 460 } div = createElem("div", {className: "scroller", id: "s6"}, [ createElem("div", {className: "wrapper"}, [ul]), createElem("div", {className: "left arrow sprite"}), createElem("div", {className: "right arrow sprite"})]); document.body.appendChild(div); prep(); }; var prep = function () { var mojo = [prepSprites, prepDrag, prepSkinKeys, prepScrollers]; setTimeout(function yield () { (mojo.shift())(); if (mojo.length !== 0) { setTimeout(yield, 30); } }, 30); }; addListener(window, "load", function (e) { presetSkin(); getData("data/s2.html", parseHTML); }); })(); Summary In this chapter we explored how to save visitor data in a cookie in order to remember their preference for a blue, fuchsia, or green skin, animate part of the DOM tree and yield the UI thread with timers, and dynamically add content with Ajax or JSON-P. Finally, we explored how to recode our function declarations as function expressions and to have JavaScript interpret our script in strict mode, which is new in ECMAScript 5. Though function declarations are simpler to work with while writing and debugging a script, function expressions are preferred insofar as those require you to use functions as values. Doing so is the key to unlocking the power of JavaScript and to your becoming a JavaScript wizard.
Index ■ ■ ■ ■ SYMBOLS , operator, 93 !! idiom, 352 !== operator, 71 < operator, 77 operator, 75 >= operator, 80 . operator, 13 () operator, 221, 226, 239 [] operator, 10, 17, 30, 41, 65, 260 @ directives, 322 @import, 322, 326–327, 340, 343 @page, 322 *= operator, 61, 63 /= operator, 61, 63 && operator, 82, 84 + operator, 25 += operator, 61, 63 -= operator, 61, 63 === operator, 5, 69, 107 || operator, 82–83 ■ A ActiveXObject(), 423–425 addEventListener(), 352 Internet Explorer and, 348 parameters, 348 addListener(), 353, 367, 376, 383, 395, 419 addRule(), 329, 340 addSheet(), 340–343 addToTally(), 98 Ajax ActiveXObject(), 423–425 appendChild(), 429 burst(), 423 comparing JSON to JavaScript object and array literals, 440 createElem(), 422, 428, 433, 437, 443 createXHR(), 423–425 encoding data in XML tag attributes, 435 eval(), 439, 442 getAttribute(), 437 getData(), 425, 427–428, 430, 432, 436 getElementsByTagName(), 433 innerHTML, 428–429 JSON, parsing, 439 json2.js, 440 JSON-P, 445 open(), 426 overview of, 421 padJSON(), 445 parse(), 442 parseHTML(), 428, 430, 432, 434, 436 parseJSON(), 441, 444, 447 parseJSONP(), 446–448 parseSimpleXML(), 435 parseXML(), 431–432, 436 parsing an HTML response, 427 461
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THE EXPERT’S VOICE ® IN WEB DEVE
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ii JavaScript for Absolute Beginner
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iv Contents at a Glance ■Contents
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■ CONTENTS vi ■Chapter 2: Type
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■ CONTENTS viii Sharing a Prototy
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■ CONTENTS x Querying Attributes
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■ CONTENTS xii Getting the User
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■ CONTENTS xiv About the Technica
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■ PREFACE xvi Preface In the 2005
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■ PREFACE xviii Opening Firebug L
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■ PREFACE xx Now press Return on
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■ PREFACE xxii editor reappear. N
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■ PREFACE xxiv
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CHAPTER 1 ■ REPRESENTING DATA WIT
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CHAPTER 2 ■ TYPE CONVERSION 26 Fi
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CHAPTER 2 ■ TYPE CONVERSION 54 To
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CHAPTER 3 ■ OPERATORS 58 Remember
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CHAPTER 3 ■ OPERATORS 60 Using Ja
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CHAPTER 3 ■ OPERATORS 62 dough.po
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CHAPTER 3 ■ OPERATORS 64 mincedLe
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CHAPTER 3 ■ OPERATORS 66 Figure 3
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CHAPTER 3 ■ OPERATORS 68 // 1.25
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CHAPTER 3 ■ OPERATORS 78 saigonCi
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CHAPTER 3 ■ OPERATORS 82 loganber
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CHAPTER 3 ■ OPERATORS 94 fridge.y
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CHAPTER 4 ■ CONTROLLING FLOW 98 s
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CHAPTER 4 ■ CONTROLLING FLOW 100
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CHAPTER 5 ■ MEMBER INHERITANCE 14
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CHAPTER 6 ■ FUNCTIONS AND ARRAYS
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CHAPTER 7 ■ TRAVERSING AND MODIFY
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CHAPTER 8 ■ SCRIPTING CSS 308 Rem
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CHAPTER 8 ■ SCRIPTING CSS 346
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CHAPTER 9 ■ LISTENING FOR EVENTS
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