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 JavaScript Bible Seventh Edition Danny Goodman Michael Morrison Paul Novitski Tia Gustaff Rayl WileyPublishing,Inc.  JavaScript Bible, SeventhEdition Publishedby WileyPublishing,Inc. 10475 CrosspointBoulevard Indianapolis,IN 46256 www.wiley.com Copyright2010 byWileyPublishing,Inc., Indianapolis,Indiana Publishedsimultaneouslyin Canada ISBN:978-0-470-52691-0 ManufacturedintheUnitedStatesofAmerica 1098765432 1 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorizationthroughpayment of theappropriateper-copy fee to theCopyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201)748-6008, oronlineat http://www.wiley.com/go/permissions. Limit of Liability/Disclaimer of Warranty: The publisher and the author make no representations or warranties with respect to the accuracy or completeness of the contents of this work and specifically disclaim all warranties, includingwithout limitationwarranties of fitness for a particular purpose. No warranty may be created or extended by sales orpromotionalmaterials. Theadvice and strategies containedherein may not besuitablefor every situation. This work is sold with the understanding that the publisher is not engaged in rendering legal, accounting, or other professionalservices. If professionalassistance is required, theservices of a competent professionalperson shouldbe sought. 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Library of CongressControlNumber: 2010923547 Trademarks: Wiley and the Wiley logo are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or itsaffiliates, in the UnitedStates and other countries,and may not be used withoutwritten permission. JavaScript is aregisteredtrademarkofOracleAmerica,Inc. Allothertrademarksarethepropertyoftheirrespectiveowners.Wiley Publishing,Inc. isnotassociated withanyproductorvendormentionedin thisbook. Introduction ............................................................................................................................................xxv Part I: Getting Started with JavaScript ......................1 Chapter1:JavaScript’sRoleinthe WorldWideWebandBeyond .........................................................3 Chapter2:DevelopingaScriptingStrategy ............................................................................................15 Chapter3:SelectingandUsing YourTools ............................................................................................27 Chapter4:JavaScriptEssentials ...............................................................................................................37 Part II: JavaScript Tutorial ............................... 59 Chapter5:Your FirstJavaScriptScript ...................................................................................................61 Chapter6:Browser andDocumentObjects ...........................................................................................77 Chapter7:ScriptsandHTMLDocuments ..............................................................................................95 Chapter8:ProgrammingFundamentals,PartI ....................................................................................109 Chapter9:ProgrammingFundamentals,PartII ...................................................................................121 Chapter10:WindowandDocumentObjects ......................................................................................135 Chapter11:FormsandFormElements................................................................................................153 Chapter12:Strings, Math,andDates ...................................................................................................179 Chapter13:ScriptingFramesandMultiple Windows .........................................................................191 Chapter14:ImagesandDynamicHTML .............................................................................................207 Part III: JavaScript Core Language Reference .............223 Chapter15:TheStringObject ..............................................................................................................225 Chapter16:TheMath, Number,andBooleanObjects ........................................................................269 Chapter17:TheDate Object ................................................................................................................285 Chapter18:TheArrayObject ...............................................................................................................311 Chapter19:JSON— NativeJavaScriptObjectNotation ....................................................................357 Chapter20:E4X—NativeXML Processing ........................................................................................363 Chapter21:ControlStructuresandExceptionHandling ....................................................................373 Chapter22:JavaScriptOperators ..........................................................................................................411 Chapter23:FunctionObjectsandCustom Objects ............................................................................437 Chapter24:GlobalFunctions andStatements .....................................................................................481 Part IV: Document Objects Reference ...................501 Chapter25:DocumentObjectModelEssentials ..................................................................................503 Chapter26:GenericHTMLElementObjects .......................................................................................537 Chapter27:WindowandFrameObjects .............................................................................................739 Chapter28:LocationandHistoryObjects ...........................................................................................881 Chapter29:DocumentandBodyObjects ............................................................................................907 Chapter30:LinkandAnchorObjects ..................................................................................................995 Chapter31:Image,Area,Map,andCanvasObjects..........................................................................1003 Chapter32:EventObjects...................................................................................................................1043 xv ContentsataGlance Part V: Appendixes ................................... 1123 ChapterA: JavaScriptandBrowserObjectsQuickReference ............................................................1125 ChapterB: What’sonthe CD-ROM ....................................................................................................1133 Index .....................................................................................................................................................1137 Bonus Chapters on the CD-ROM Part VI: Document Objects Reference (continued) .......BC1 Chapter33:BodyTextObjects.............................................................................................................BC2 Chapter34:TheForm andRelatedObjects ....................................................................................BC103 Chapter35:ButtonObjects ..............................................................................................................BC128 Chapter36:Text-RelatedFormObjects ...........................................................................................BC153 Chapter37:Select,Option,andFileUploadObjects ......................................................................BC177 Chapter38:StyleSheetandStyleObjects .......................................................................................BC207 Chapter39:Ajax,E4X,andXML .....................................................................................................BC272 Chapter40:HTMLDirectiveObjects ...............................................................................................BC289 Chapter41:TableandListObjects ..................................................................................................BC303 Chapter42:TheNavigatorandOtherEnvironmentObjects .........................................................BC360 Chapter43:PositionedObjects ........................................................................................................BC411 Chapter44:EmbeddedObjects........................................................................................................BC448 Chapter45:TheRegularExpressionandRegExpObjects..............................................................BC465 Part VII: More JavaScript Programming ............... BC491 Chapter46:Data-EntryValidation ...................................................................................................BC492 Chapter47:ScriptingJavaApplets andPlug-Ins .............................................................................BC524 Chapter48:DebuggingScripts .........................................................................................................BC564 Chapter49:SecurityandNetscapeSignedScripts ..........................................................................BC590 Chapter50:Cross-BrowserDynamic HTMLIssues .........................................................................BC608 Chapter51:InternetExplorerBehaviors ..........................................................................................BC623 Part VIII: Applications ...............................BC636 Chapter52:Application:TablesandCalendars...............................................................................BC637 Chapter53:Application:ALookupTable .......................................................................................BC652 Chapter54:Application:APoorMan’sOrderForm.......................................................................BC665 Chapter55:Application:Outline-StyleTableofContents ..............................................................BC674 Chapter56:Application:CalculationsandGraphics .......................................................................BC695 Chapter57:Application:Intelligent‘‘Updated’’Flags ......................................................................BC705 Chapter58:Application:DecisionHelper .......................................................................................BC715 Chapter59:Application:Cross-BrowserDHTML MapPuzzle .......................................................BC747 Chapter60:Application:TransformingXMLData ..........................................................................BC764 Chapter61:Application:CreatingCustom GoogleMaps ...............................................................BC782 Part IX: Appendixes (continued) ......................BC799 Appendix C:JavaScriptReservedWords..........................................................................................BC800 Appendix D: Answersto TutorialExercises .....................................................................................BC801 Appendix E: JavaScriptandDOM InternetResources .....................................................................BC818 xvi Introduction ............................................ xxv PartI: GettingStartedwithJavaScript 1 Chapter1:JavaScript’sRoleintheWorldWideWeband Beyond ......3 CompetingforWebTraffic .............................................................................................................4 OtherWebTechnologies .................................................................................................................4 JavaScript:ALanguageforAll ......................................................................................................10 JavaScript:TheRightToolforthe RightJob ................................................................................12 Chapter2:DevelopingaScriptingStrategy ......................15 BrowserLeapfrog ...........................................................................................................................15 DuckandCover ............................................................................................................................16 CompatibilityIssuesToday ...........................................................................................................17 DevelopingaScriptingStrategy ....................................................................................................22 Chapter3:Selectingand UsingYourTools ......................27 TheSoftwareTools ........................................................................................................................27 SettingUp Your AuthoringEnvironment .....................................................................................28 Validate,Validate,Validate ............................................................................................................31 CreatingYour FirstScript .............................................................................................................31 Chapter4:JavaScript Essentials ...............................37 CombiningJavaScriptwithHTML ................................................................................................37 DesigningforCompatibility ..........................................................................................................51 LanguageEssentialsforExperiencedProgrammers......................................................................54 PartII: JavaScriptTutorial 59 Chapter5:YourFirstJavaScript Script ..........................61 WhatYourFirstScriptWillDo ....................................................................................................61 EnteringYour FirstScript .............................................................................................................62 HaveSomeFun .............................................................................................................................74 Exercises .........................................................................................................................................75 Chapter6:BrowserandDocumentObjects ..................... 77 ScriptsRunthe Show ....................................................................................................................77 WhentoUse JavaScript.................................................................................................................78 TheDocumentObjectModel ........................................................................................................79 WhenaDocumentLoads ..............................................................................................................82 xvii Contents ObjectReferences ..........................................................................................................................85 Node Terminology .........................................................................................................................87 WhatDefines anObject?...............................................................................................................88 Exercises .........................................................................................................................................93 Chapter7: ScriptsandHTMLDocuments ....................... 95 ConnectingScriptsto Documents ................................................................................................95 JavaScriptStatements .....................................................................................................................99 WhenScriptStatementsExecute ................................................................................................100 ViewingScriptErrors ..................................................................................................................104 ScriptingversusProgramming ....................................................................................................105 Exercises.......................................................................................................................................106 Chapter8: ProgrammingFundamentals,PartI .................. 109 WhatLanguage IsThis? ..............................................................................................................109 WorkingwithInformation ..........................................................................................................109 Variables .......................................................................................................................................110 ExpressionsandEvaluation.........................................................................................................112 Data Type Conversions ...............................................................................................................115 Operators .....................................................................................................................................116 Exercises.......................................................................................................................................118 Chapter9: ProgrammingFundamentals,PartII ..................121 DecisionsandLoops....................................................................................................................121 ControlStructures .......................................................................................................................122 RepeatLoops ...............................................................................................................................124 Functions .....................................................................................................................................124 CurlyBraces .................................................................................................................................128 Arrays ...........................................................................................................................................129 Exercises.......................................................................................................................................133 Chapter10: WindowandDocumentObjects ................... 135 Top-LevelObjects ........................................................................................................................135 The windowObject .....................................................................................................................135 windowPropertiesandMethods ................................................................................................139 The locationObject .....................................................................................................................142 The navigatorObject ...................................................................................................................143 The documentObject..................................................................................................................143 Exercises.......................................................................................................................................152 Chapter11: Formsand FormElements ........................ 153 The Formobject ..........................................................................................................................153 Form ControlsasObjects ...........................................................................................................158 PassingElementstoFunctions withthis ....................................................................................170 SubmittingandPrevalidatingForms ..........................................................................................173 Exercises.......................................................................................................................................177 Chapter12: Strings,Math, andDates ......................... 179 CoreLanguageObjects................................................................................................................179 StringObjects ..............................................................................................................................180 The MathObject .........................................................................................................................183 The Date Object ..........................................................................................................................184 xviii Contents DateCalculations .........................................................................................................................186 Exercises.......................................................................................................................................189 Chapter13:ScriptingFrames andMultipleWindows ..............191 Frames:ParentsandChildren .....................................................................................................191 ReferencesAmongFamilyMembers ...........................................................................................194 Frame-ScriptingTips ...................................................................................................................195 AboutiframeElements ................................................................................................................196 HighlightingFootnotes:AFramesetScriptingExample ............................................................196 ReferencesforMultipleWindows ...............................................................................................202 Exercises.......................................................................................................................................206 Chapter14:ImagesandDynamic HTML ....................... 207 TheImageObject ........................................................................................................................207 RolloversWithoutScripts ...........................................................................................................216 Thejavascript:Pseudo-URL ........................................................................................................219 PopularDynamic HTMLTechniques .........................................................................................220 Exercises.......................................................................................................................................222 PartIII: JavaScriptCoreLanguageReference 223 Chapter15:TheStringObject ...............................225 StringandNumberData Types ..................................................................................................225 StringObject ................................................................................................................................228 StringUtilityFunctions ...............................................................................................................261 URLStringEncodingandDecoding ...........................................................................................267 Chapter16:TheMath,Number,and BooleanObjects ............ 269 NumbersinJavaScript.................................................................................................................269 MathObject .................................................................................................................................276 NumberObject ............................................................................................................................280 BooleanObject.............................................................................................................................284 Chapter17:TheDateObject ................................285 TimeZonesandGMT .................................................................................................................285 TheDate Object ..........................................................................................................................287 ValidatingDate EntriesinForms ................................................................................................304 Chapter18:TheArrayObject ............................... 311 StructuredData ............................................................................................................................311 CreatinganEmpty Array ............................................................................................................312 PopulatinganArray.....................................................................................................................313 JavaScriptArrayCreationEnhancements ...................................................................................314 DeletingArrayEntries .................................................................................................................315 ParallelArrays ..............................................................................................................................315 MultidimensionalArrays .............................................................................................................320 SimulatingaHashTable .............................................................................................................321 ArrayObject ................................................................................................................................323 ArrayComprehensions ................................................................................................................353 xix Contents DestructuringAssignment ...........................................................................................................354 CompatibilitywithOlderBrowsers ............................................................................................355 Chapter19: JSON—Native JavaScriptObject Notation ............357 HowJSONWorks .......................................................................................................................357 SendingandReceivingJSONData .............................................................................................359 JSON Object ................................................................................................................................360 SecurityConcerns ........................................................................................................................361 Chapter20: E4X —Native XMLProcessing ..................... 363 XML .............................................................................................................................................363 ECMAScriptforXML (E4X) ........................................................................................................364 Chapter21: ControlStructuresand ExceptionHandling ........... 373 If andIf...Else Decisions ...........................................................................................................373 ConditionalExpressions ..............................................................................................................379 The switchStatement ..................................................................................................................380 Repeat(for)Loops .......................................................................................................................384 The whileLoop ...........................................................................................................................388 The do-whileLoop ......................................................................................................................390 Loopingthrough Properties(for-in) ...........................................................................................390 The withStatement .....................................................................................................................392 LabeledStatements ......................................................................................................................393 ExceptionHandling .....................................................................................................................397 Using try-catch-finallyConstructions .........................................................................................398 ThrowingExceptions ...................................................................................................................402 ErrorObject .................................................................................................................................407 Chapter22: JavaScript Operators ............................ 411 OperatorCategories .....................................................................................................................411 ComparisonOperators ................................................................................................................412 Equalityof DisparateData Types ................................................................................................413 ConnubialOperators ...................................................................................................................415 Assignment Operators .................................................................................................................418 BooleanOperators .......................................................................................................................420 Bitwise Operators.........................................................................................................................424 ObjectOperators .........................................................................................................................425 MiscellaneousOperators .............................................................................................................430 OperatorPrecedence ...................................................................................................................433 Chapter23: FunctionObjectsandCustomObjects ...............437 FunctionObject ...........................................................................................................................437 FunctionApplicationNotes ........................................................................................................447 CreatingYour OwnObjectswithObject-OrientedJavaScript ..................................................458 Object-OrientedConcepts ...........................................................................................................470 ObjectObject...............................................................................................................................474 Chapter24: GlobalFunctionsand Statements ...................481 Functions .....................................................................................................................................482 Statements ....................................................................................................................................492 WinIEObjects .............................................................................................................................496 xx Contents PartIV: DocumentObjects Reference 501 Chapter25:DocumentObjectModelEssentials ................. 503 TheObjectModelHierarchy ......................................................................................................503 HowDocumentObjectsAreBorn ..............................................................................................505 ObjectProperties .........................................................................................................................506 ObjectMethods ...........................................................................................................................507 ObjectEventHandlers ................................................................................................................508 ObjectModelSmorgasbord.........................................................................................................509 BasicObjectModel ......................................................................................................................510 BasicObjectModelPlusImages .................................................................................................511 Navigator4–OnlyExtensions .....................................................................................................511 InternetExplorer4+Extensions ................................................................................................512 InternetExplorer5+Extensions ................................................................................................515 TheW3CDOM ...........................................................................................................................516 ScriptingTrends ..........................................................................................................................532 StandardsCompatibilityModes(DOCTYPESwitching) ............................................................534 WheretoGo fromHere ..............................................................................................................535 Chapter26:GenericHTMLElementObjects .................... 537 GenericObjects ...........................................................................................................................537 Chapter27:Windowand Frame Objects .......................739 WindowTerminology .................................................................................................................739 Frames..........................................................................................................................................740 windowObject ............................................................................................................................746 frameElementObject..................................................................................................................854 framesetElementObject .............................................................................................................862 iframeElementObject.................................................................................................................868 popupObject ...............................................................................................................................875 Chapter28:Locationand HistoryObjects ......................881 locationObject ............................................................................................................................881 historyObject ..............................................................................................................................900 Chapter29:DocumentandBodyObjects ...................... 907 documentObject .........................................................................................................................908 bodyElementObject ...................................................................................................................981 TreeWalkerObject ......................................................................................................................990 Chapter30:Linkand AnchorObjects ......................... 995 Anchor,Link,anda ElementObjects ........................................................................................995 Chapter31:Image,Area, Map, andCanvasObjects ..............1003 ImageandimgElementObjects ...............................................................................................1003 areaElementObject ..................................................................................................................1024 mapElementObject..................................................................................................................1028 canvasElementObject ..............................................................................................................1032 xxi Contents Chapter32: EventObjects .................................1043 Why ‘‘Events’’? ...........................................................................................................................1044 Event Propagation .....................................................................................................................1045 Referencingthe eventObject ....................................................................................................1059 Binding Events ...........................................................................................................................1059 eventObjectCompatibility .......................................................................................................1064 DuelingEventModels ...............................................................................................................1066 Event Types ...............................................................................................................................1070 NN6+/MozeventObject ..........................................................................................................1097 PartV: Appendixes 1123 AppendixA:JavaScript andBrowserObjectsQuick Reference ..... 1125 AppendixB:What’sontheCD-ROM .........................1133 Index .................................................1137 BonusChapterson theCD-ROM PartVI: DocumentObjectsReference(continued) BC1 Chapter33: BodyTextObjects ..............................BC2 Chapter34: TheForm andRelatedObjects ...................BC103 Chapter35: ButtonObjects .............................. BC128 Chapter36: Text-RelatedFormObjects ......................BC153 Chapter37: Select,Option,andFileUploadObjects ............BC177 Chapter38: StyleSheetandStyleObjects ....................BC207 Chapter39: Ajax, E4X, andXML ............................BC272 Chapter40: HTMLDirectiveObjects ........................BC289 Chapter41: TableandList Objects ......................... BC303 Chapter42: TheNavigatorandOtherEnvironmentObjects ...... BC360 Chapter43: PositionedObjects ........................... BC411 xxii

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JavaScript Bible, 7th Edition PDF

1998 Pages·9.789 MB·English
by  Danny Goodman, Michael Morrison, Paul Novitski, Cynthia Gustaff Rayl
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