JavaScript Examples Bible - UserWorks Technologies

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Chapter 12 ✦ Navigator and Other Environment Objects (Chapter 28) Example Use The Evaluator (Chapter 13 in the JavaScript Bible) with your IE4+ browser to compare the values of the three language-related properties running on your computer. Enter each of the following statements into the top text box: navigator.browserLanguage navigator.systemLanguage navigator.userLanguage Don’t be surprised if all three properties return the same value. Methods preference(name [, val]) NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility ✓ ✓ Example The page in Listing 28-2 displays checkboxes for several preference settings, plus one text box to show a preference setting value for the size of the browser’s disk cache. To run this script without signing the scripts, turn on codebase principals as directed in Chapter 46 of the JavaScript Bible. (The listing file on the CD-ROM does not employ signed scripts.) One function reads all the preferences and sets the form control values accordingly. Another function sets a preference when you click its checkbox. Because of the interaction among three of the cookie settings, it is easier to have the script rerun the showPreferences() function after each setting rather than you trying to manually control the properties of the three checkboxes. Rerunning that function also helps verify that you set the preference. Listing 28-2: Reading and Writing Browser Preferences Reading/Writing Browser Preferences function setPreference(pref, value) { netscape.security.PrivilegeManager.enablePrivilege( “UniversalPreferencesWrite”) navigator.preference(pref, value) netscape.security.PrivilegeManager.revertPrivilege( “UniversalPreferencesWrite”) showPreferences() } Continued 405 navigator.preference()
406 JavaScript Examples Bible: The Essential Companion to JavaScript Bible navigator.preference() Listing 28-2 (continued) function showPreferences() { var form = document.forms[0] netscape.security.PrivilegeManager.enablePrivilege( “UniversalPreferencesRead”) form.imgLoad.checked = navigator.preference(“general.always_load_images”) form.cacheSize.value = navigator.preference(“browser.cache.disk_cache_size”) form.ssEnable.checked = navigator.preference(“browser.enable_style_sheets”) form.autoIEnable.checked = navigator.preference(“autoupdate.enabled”) var cookieSetting = navigator.preference(“network.cookie.cookieBehavior”) for (var i = 0; i < 3; i++) { form.elements[“cookie” + i].checked = (i == cookieSetting) ? true : false } form.cookieWarn.checked = navigator.preference(“network.cookie.warnAboutCookies”) netscape.security.PrivilegeManager.revertPrivilege( “UniversalPreferencesRead”) } Browser Preferences Settings Sampler Automatically Load Images Style Sheets Enabled AutoInstall Enabled Accept All Cookies Accept Only Cookies Sent Back to Server Disable Cookies Warn Before Accepting Cookies Disk cache is KB
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100% ONE HUNDRED PERCENT COMPREHENS
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“An excellent book that builds so
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JavaScript Examples Bible: The Ess
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About the Author Danny Goodman is t
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Preface Acommon thread running thro
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Preface Listing numbers are derived
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Acknowledgments Because most of the
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Contents Preface. . . . . . . . . .
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Contents Chapter 7: The Form and Re
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Contents Chapter 15: The NN4 Layer
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2 JavaScript Examples Bible: The Es
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100 JavaScript Examples Bible: The
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192 FRAME.scrolling JavaScript Exam
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196 FRAMESET.cols JavaScript Exampl
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198 IFRAME.align JavaScript Example
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200 IFRAME.src JavaScript Examples
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192 FRAME.scrolling JavaScript Exam
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196 FRAMESET.cols JavaScript Exampl
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198 IFRAME.align JavaScript Example
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200 IFRAME.src JavaScript Examples
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234 document.height JavaScript Exam
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236 document.layers JavaScript Exam
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254 document.write() JavaScript Exa
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Body Text Objects (Chapter 19) The
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Note Chapter 5 ✦ Body Text Object
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Chapter 5 ✦ Body Text Objects (Ch
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width Chapter 5 ✦ Body Text Objec
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commonAncestorContainer Chapter 5
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Methods cloneContents() cloneRange(
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extractContents() Chapter 5 ✦ Bod
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var count = form.deleteCount.value
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inRange(otherRangeRef) Chapter 5
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TextRectangle Object Properties bot
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Image, Area, and Map Objects (Chapt
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Chapter 6 ✦ Image, Area, and Map
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dynsrc Chapter 6 ✦ Image, Area, a
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nameProp Chapter 6 ✦ Image, Area,
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start x y Chapter 6 ✦ Image, Area
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} Chapter 6 ✦ Image, Area, and Ma
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The Form and Related Objects (Chapt
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Chapter 7 ✦ The Form and Related
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length Chapter 7 ✦ The Form and R
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submit() Chapter 7 ✦ The Form and
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Button Objects (Chapter 24) The top
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Chapter 8 ✦ Button Objects (Chapt
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Checkbox Input Object Properties ch
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Page 468 and 469: Select, Option, and Optgroup Object
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Page 474 and 475: selectedIndex Chapter 10 ✦ Select
Page 476 and 477: Event handlers onChange Chapter 10
Page 480 and 481: Table and List Objects (Chapter 27)
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Page 496 and 497: Navigator and Other Environment Obj
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Page 502 and 503: mimeTypes Chapter 12 ✦ Navigator
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String and Number Objects (Chapters
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Parsing methods string.charAt(index
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488 array.concat() JavaScript Examp
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490 array.concat() JavaScript Examp
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492 array.reverse() JavaScript Exam
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494 array.sort() JavaScript Example
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What’s on the CD-ROM The accompan
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A above property, 442-443 accessKey
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set to empty, 11 working with, 12 c
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location property, 238-240 methods,
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frames border, 197-198, 199 control
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onDragStart event handler, 103, 108
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insertBefore() method compatibility
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go(), 221-222 hasChildNodes(), 74-7
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NN4 layer object above property, 44
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onSelectStart event handler compati
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frame, 385-387 FRAME element object
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protocol property, 213 document obj
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self property compatibility, 149 ex
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text property BODY element object,
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X x property IE4+ event object, 413
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4. Restrictions on Use of Individua
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CD-ROM Installation Instructions Th
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