JavaScript Examples Bible - UserWorks Technologies

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Note Chapter 5 ✦ Body Text Objects (Chapter 19) three FONT object properties, and their NAME attributes are strategically assigned the names of the properties (as you see in a moment). VALUE attributes for OPTION elements contain strings that are to be assigned to the various properties. Each SELECT element invokes the same setFontAttr() function, passing a reference to itself so that the function can inspect details of the element. The first task of the setFontAttr() function is to make sure that only browsers capable of treating the FONT element as an object get to the meat of the function. The test for the existence of document.all and the myFONT element blocks all older browsers from changing the font characteristics. As the page loads, the document.all property is set for NN6 by using a variation of the normalization technique described in Chapter 14 of the JavaScript Bible. For suitably equipped browsers, the function next extracts the string from the value property of the SELECT object that was passed to the function. If a selection is made (meaning other than the first, empty one), then the single nested statement uses the setAttribute() method to assign the value to the attribute whose name matches the name of the SELECT element. An odd bug in IE5/Mac doesn’t let the rendered color change when changing the color property. But the setting is valid, as proven by selecting any of the other two property choices. Listing 19-1: Controlling FONT Object Properties FONT Object Properties // document.all normalization trick for NN6 if (navigator.appName == “Netscape” && parseInt(navigator.appVersion) >= 5) { document.all = document.getElementsByTagName(“*”) } // one function does all! function setFontAttr(select) { if (document.all && document.all.myFONT) { var choice = select.options[select.selectedIndex].value if (choice) { document.all.myFONT.setAttribute(select.name, choice) } } } Font Object Properties Continued 267 FONT.color
268 FONT.face JavaScript Examples Bible: The Essential Companion to JavaScript Bible Listing 19-1 (continued) This may look like a simple sentence, but THESE THREE WORDS are contained by a FONT element. Select a text color: Red Green Blue Some Hex Triplet Value Select a font face: Helvetica Times Comic Sans MS, sans-serif Courier, monospace Zapf Dingbats, serif Select a font size: 3 (Default) Increase Default by 1 Decrease Default by 1 Smallest Biggest face NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5 Compatibility ✓ ✓ ✓ ✓
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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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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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Page 315 and 316: 216 JavaScript Examples Bible: The
Page 333 and 334: 234 document.height JavaScript Exam
Page 335 and 336: 236 document.layers JavaScript Exam
Page 353 and 354: 254 document.write() JavaScript Exa
Page 364 and 365: Body Text Objects (Chapter 19) The
Page 368 and 369: Chapter 5 ✦ Body Text Objects (Ch
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Page 378 and 379: Methods cloneContents() cloneRange(
Page 384 and 385: extractContents() Chapter 5 ✦ Bod
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Page 408 and 409: inRange(otherRangeRef) Chapter 5
Page 414 and 415: 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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value Chapter 8 ✦ Button Objects
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Text-Related Form Objects (Chapter
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Chapter 9 ✦ Text-Related Form Obj
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document.forms[0].inspector.readOnl
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Chapter 9 ✦ Text-Related Form Obj
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} } Chapter 9 ✦ Text-Related Form
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onChange Chapter 9 ✦ Text-Related
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Select, Option, and Optgroup Object
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Chapter 10 ✦ Select, Option, and
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selectedIndex Chapter 10 ✦ Select
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Event handlers onChange Chapter 10
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Table and List Objects (Chapter 27)
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gColor Chapter 11 ✦ Table and Lis
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Now, adjust the cell spacing: docum
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NigerAtlantic Ocean26004180 Zamb
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Chapter 11 ✦ Table and List Objec
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type Chapter 11 ✦ Table and List
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Navigator and Other Environment Obj
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Chapter 12 ✦ Navigator and Other
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mimeTypes Chapter 12 ✦ Navigator
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screen Object Properties availLeft
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Event Objects (Chapter 29) As earli
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Chapter 13 ✦ Event Objects (Chapt
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Chapter 13 ✦ Event Objects (
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Figure 13-2: Clicking on one SPAN e
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clientX clientY layerX layerY pageX
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eventPhase Chapter 13 ✦ Event Obj
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440 ruleObject.style JavaScript Exa
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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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