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CHAPTER 7 ■ TRAVERSING AND MODIFYING THE DOM TREE 296 } if (children instanceof Array) { for (i = 0; i < children.length; i ++ ) { elem.appendChild( typeof children[i] === "object" ? children[i] : document.createTextNode(children[i]) ); } } return elem; } var child = createElem( "li", {id: "bebo", className: "sprite"}, [createElem("a", {href: "http://www.bebo.com"}, ["Bebo"])] ); document.getElementsByTagName("ul")[0].appendChild(child); Did everything work for you? Good job. You’re definitely well on your way from JavaScript dummy to expert. Figure 7–20. Creating elements with a helper function
Reordering Nested Lists CHAPTER 7 ■ TRAVERSING AND MODIFYING THE DOM TREE Let’s try a final sample so that many of the features covered in this chapter take firm root in your noggin. You’re going to write a function named orderUL that will alphabetically reorder any descendant elements of a regardless of whether it contains nested elements. First, download seven2.html (shown here) from the chapter downloads at www.apress.com. Then open it with Firefox and press F12 to enable Firebug. Note that seven2.html lists the 30 ice hockey teams in the NHL. Firebug Western Conference Chicago Blackhawks Columbus Blue Jackets Detroit Red Wings Nashville Predators St Louis Blues Calgary Flames Colorado Avalanche Edmonton Oilers Minnesota Wild Vancouver Canucks Anaheim Ducks Dallas Stars Los Angeles Kings Phoenix Coyotes San Jose Sharks Eastern Conference New Jersey Devils New York Islanders New York Rangers Philadelphia Flyers Pittsburgh Penguins Boston Bruins Buffalo Sabres Montreal Canadiens Ottawa Senators Toronto Maple Leafs Atlanta Thrashers Carolina Hurricanes Florida Panthers Tampa Bay Lightning Washington Capitals 297
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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 70 • If b
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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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Page 272 and 273: CHAPTER 6 ■ FUNCTIONS AND ARRAYS
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CHAPTER 8 ■ SCRIPTING CSS 346
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CHAPTER 9 ■ LISTENING FOR EVENTS
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■ INDEX 462 parsing an XML respon
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■ INDEX 464 creating, 217 queryin
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■ INDEX 466 document.styleSheets,
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■ INDEX 468 listening for mousedo
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■ INDEX 470 chaining prototypes,
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■ INDEX 474 ■ P padJSON(), 445
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■ INDEX 476 ten.js, 401 ternary o
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