Professional JavaScript For Web Developers

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Chapter 12 The concept Keep in mind is that each cell in a table must have a sortable value, meaning a value that is a string, integer, float, or date. Because all HTML code can’t be converted directly into one of these data types, you need to specify an alternate value to sort by. This can be accomplished by adding an extra attribute on each that contains HTML, like this: Because this table cell contains an image, you normally wouldn’t be able to sort it. However, the addition of the value attribute specifies that the value to sort is “blue”, not the contents of the element. And as you learned earlier, it is possible to access this new attribute using the DOM getAttribute() method: var sValue = oTD.getAttribute(“value”); Now, it isn’t necessary to add a value attribute to every cell in a table, because this gives you a lot of redundant information. You should only add the attribute to those table cells containing HTML code. For example, the following table lists filenames along with their associated icons. Note that only the first column uses the extra value attribute: Type Filename My Resume.doc Fall Budget.xls How to be a better programmer.pdf My Old Resume.doc Notes from Meeting.txt Backups.zip 382
Sorting Tables Spring Budget.xls Job Description - Web Designer.doc Saved Web Page.pdf Chapter 1.doc However, this new attribute alone doesn’t solve the problem. You must also update the JavaScript code to take advantage of the value attribute. As mentioned earlier in the book, adding custom attributes to HTML tags is not allowed using the strict representation of XHTML. You may alternately want to provide the value for a table cell using the title attribute (if the value will make sense to the user) or by providing an invisible inside the table cell that contains the value. Modifying the code This final modification to the code determines whether to get the sortable value from the element’s text or from the value attribute. Here’s the updated code: function generateCompareTRs(iCol, sDataType) { return function compareTRs(oTR1, oTR2) { var vValue1, vValue2; if (oTR1.cells[iCol].getAttribute(“value”)) { vValue1 = convert(oTR1.cells[iCol].getAttribute(“value”), sDataType); vValue2 = convert(oTR2.cells[iCol].getAttribute(“value”), sDataType); } else { vValue1 = convert(oTR1.cells[iCol].firstChild.nodeValue, sDataType); vValue2 = convert(oTR2.cells[iCol].firstChild.nodeValue, sDataType); } 383
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Professional JavaScript for Web De
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Professional JavaScript for Web De
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Vice President and Executive Group
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Contents Acknowledgments Introducti
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Contents Scope 88 Public, protected
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Contents Simple Patterns 197 Metach
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Contents Chapter 10: Advanced DOM T
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Contents Chapter 14: Error Handling
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Contents Chapter 18: Interacting wi
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Introduction Although once supporte
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Introduction 2. ECMAScript Basics T
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Conventions Introduction To help yo
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What Is JavaScript? When JavaScript
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JavaScript Implementations What Is
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ECMAScript support in Web browsers
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What Is JavaScript? By creating a t
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The Browser Object Model (BOM) What
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Chapter 2 ❑ End-of-line semicolon
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Chapter 2 ❑ ❑ Pascal Notation
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Chapter 2 When a value is assigned
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Chapter 2 alert(typeof oTemp); aler
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Chapter 2 A few special values are
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Chapter 2 Converting to a string Th
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Chapter 2 The parseFloat() method w
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Chapter 2 This syntax is similar to
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Chapter 2 The toFixed() method retu
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Chapter 2 Next up is the concat() m
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Chapter 2 alert(oStringObject.subst
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Chapter 2 If you place this line of
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Chapter 2 The postfix increment and
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Chapter 2 1 0 0 1 0 (2 4 x1) + (2 3
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Chapter 2 var iResult = 25 & 3; ale
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Chapter 2 Note that left shift pres
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Chapter 2 In this example, a Boolea
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Chapter 2 Just like logical AND, if
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Chapter 2 Just like the multiplicat
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Chapter 2 var bResult = “23” <
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Chapter 2 operator to compare the s
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Chapter 2 if (i > 25) alert(“Grea
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Chapter 2 Labeled statements It is
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Chapter 2 The with statement The wi
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Chapter 2 For example: function say
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Chapter 2 The arguments object With
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Chapter 2 var doAdd = new Function(
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Chapter 2 } return iNum1 + iNum2 +
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Chapter 3 The object definition is
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Chapter 3 Types of Objects In ECMAS
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Chapter 3 The Array object override
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Chapter 3 Push onto the stack top b
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Chapter 3 They wait their turns, ev
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Chapter 3 This line creates a new D
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Chapter 3 Method setFullYear(year)
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Chapter 3 This code outputs two val
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Chapter 3 Property Error EvalError
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Chapter 3 Here, Math.E is first rai
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Chapter 3 Scope Programmers in any
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Chapter 3 In this code, the functio
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Chapter 3 Some got around this prob
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Chapter 3 Car.prototype.color = “
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Chapter 3 } } Car.prototype.showCol
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Chapter 3 StringBuffer.prototype.ap
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Chapter 3 } } } return -1; This met
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Chapter 3 Summary ECMAScript provid
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Chapter 4 Shape Ellipse Polygon Cir
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Chapter 4 All new properties and me
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Chapter 4 The apply() method The ap
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Chapter 4 ClassB.prototype.name =
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Chapter 4 In ECMAScript, the class
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Chapter 4 } Rectangle.prototype = n
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Chapter 4 the limit in an effort to
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Chapter 4 Dynamic prototyping suppo
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Chapter 4 } } ClassZ.prototype.sayM
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Chapter 4 In this case, the supercl
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Chapter 4 Rectangle.prototype.getAr
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Chapter 5 Although originally creat
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Chapter 5 ❑ ❑ Code Maintenance
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Chapter 5 on the following line. Ne
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Chapter 5 alert("A is greater
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Chapter 5 Figure 5-2 The next tag i
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Chapter 5 The Browser Object Model
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Chapter 5 Frameset Example
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Chapter 5 ❑ resizeTo(w, h) — re
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Chapter 5 As mentioned previously,
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Chapter 5 To determine if the user
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Chapter 5 Books Be careful not to o
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Chapter 5 Here, the code uses linke
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Chapter 5 you want to track where u
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Chapter 5 This code writes a tag t
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Chapter 5 The method assign() accom
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Chapter 5 Property/Method Descripti
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DOM Basics The Document Object Mode
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DOM Basics Today XML is one of the
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DOM Basics The Document Object Mode
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DOM Basics The node is considered
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DOM Basics The W3C has also publish
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DOM Basics Checking the node type Y
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Accessing specific nodes You alread
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DOM Basics To access the element w
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DOM Basics You’re not done quite
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DOM Basics This sample page replace
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DOM Basics To get and set the src a
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DOM Basics ❑ ❑ ❑ deleteCaptio
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DOM Basics Document Element html El
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DOM Basics var node3 = iterator.pre
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DOM Basics Hello World! List i
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DOM Basics var oOutput = document.g
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DOM Basics necessarily mean that th
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Chapter 7 This regular expression m
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Chapter 7 var sToChange = “The sk
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Chapter 7 This code matches the let
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Chapter 7 Note that [a-z] matches o
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Chapter 7 You can read this regular
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Chapter 7 For the second regular ex
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Chapter 7 Expressions to match lead
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Chapter 7 In this, reRedOrBlack mat
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Chapter 7 Lookaheads Sometimes you
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Chapter 7 It is, in fact, easier to
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Chapter 7 reB.exec(sToMatch); alert
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Chapter 7 Common Patterns On the We
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Chapter 7 The isValidDate() functio
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Chapter 7 } } } bIsOdd = !bIsOdd; A
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Chapter 7 Validating e-mail address
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Browser and Operating System Detect
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The important things to note in thi
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Detecting Opera The simplest and be
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Depending on which browsers you pla
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All about Events JavaScript’s int
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All about Events document 3 bubblin
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All about Events Some have also cal
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Using this method of assignment, th
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All about Events var oDiv = documen
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Properties/methods Internet Explore
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All about Events Property/Method Ty
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Detecting Shift, Alt, Ctrl To detec
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Getting the target The object at th
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All about Events When the button is
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All about Events Using the mouseove
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All about Events if (oEvent.fromEle
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All about Events Event properties F
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All about Events ❑ ❑ ❑ ❑ Th
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All about Events The actual res
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All about Events window.onscroll =
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All about Events In the second part
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All about Events DOM Property/Metho
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All about Events }; } return oEvent
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All about Events oEvent.eventPhase
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All about Events } var oTextbox = d
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Chapter 10 CSS Style Attribute back
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Chapter 10 var oDiv = document.getE
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Chapter 10 This example passes the
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Chapter 10 ❑ ❑ ❑ ❑ ❑ medi
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Chapter 10 In this example, three
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Chapter 10 } function getBackgrou
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Chapter 10 node in question. For ex
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Chapter 10 If you plan to use DOM r
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Chapter 10 Hello World oRange
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Chapter 10 ❑ setEndAfter(refNode)
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Chapter 10 Interacting with DOM ran
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Chapter 10 The following code accom
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Chapter 10 Comparing DOM ranges If
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Chapter 10 The closest thing to the
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Page 363 and 364: Forms and Data Integrity Form eleme
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Page 398 and 399: Chapter 12 Smith Johnson Hend
Page 400 and 401: Chapter 12 This section of code cre
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Page 404 and 405: Chapter 12 Last Name First Name
Page 406 and 407: Chapter 12 Creating a conversion fu
Page 408 and 409: Chapter 12 Using this methodology,
Page 412 and 413: Chapter 12 } }; if (vValue1 < vValu
Page 415 and 416: Drag and Drop One of the biggest im
Page 417 and 418: Drag and Drop } Try dragging th
Page 419 and 420: Drag and Drop function handleDragDr
Page 421 and 422: Drag and Drop In this example, all
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Page 427 and 428: Drag and Drop } } oEvent.srcElement
Page 429 and 430: Drag and Drop function handleMouseD
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Page 433 and 434: Drag and Drop } return (iX >= iX1 &
Page 435 and 436: Drag and Drop The zDraggable object
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Page 442 and 443: Chapter 14 Figure 14-2 The other op
Page 444 and 445: Chapter 14 The problem with IE/Mac
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Page 450 and 451: Chapter 14 Handling syntax errors T
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Chapter 14 As you can see, this red
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Chapter 14 The last utility window
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Chapter 14 Figure 14-14 Foreground
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Chapter 14 Under each file (JavaScr
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Chapter 14 Figure 14-19 You also ha
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Chapter 14 Adding a watch adds a va
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XML in JavaScript With the rising p
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XML in JavaScript using the string
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Retrieving XML After you’ve gotte
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XML in JavaScript This line of code
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XML in JavaScript As long as you in
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XML in JavaScript Unfortunately, th
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XML in JavaScript try { var oXmlDom
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XML in JavaScript var oXmlDom = new
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XML in JavaScript Document.prototyp
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XML in JavaScript With this code ad
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XML in JavaScript }; } this.parseEr
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XPath support in IE Microsoft saw f
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XML in JavaScript XPathResult.ORDER
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XML in JavaScript If you feel like
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XML in JavaScript As you can see,
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XML in JavaScript Employees
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XML in JavaScript The setStartMode(
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XML in JavaScript var oProcessor =
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Chapter 16 Cookie ingredients No ch
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Chapter 16 The setCookie() function
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Chapter 16 } %> for (int i=0; i < c
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Chapter 16 The one restriction on s
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Chapter 16 Hidden Frames A trick th
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Chapter 16 } setTimeout(function ()
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Chapter 16 with the HTTP status of
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Chapter 16 Assuming that you have s
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Chapter 16 It also helps to have a
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Chapter 16 var oReader = new java.i
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Chapter 16 oConnection.setRequestPr
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Chapter 16 } else if (navigator.jav
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Chapter 16 }; }, 10); } else { aler
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Web Services In the past two years,
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Web Services xmlns=”http://schema
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Web Services The pertinent informat
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Web Services var oResult = window.e
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Enhanced privileges Contacting a di
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Web Services ❑ ❑ ❑ ❑ ❑
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Web Services Once again, the first
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Web Services } onError: function (s
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Web Services } else { alert(“Prox
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Web Services var oService = new Web
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Web Services This line of code crea
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Interacting with Plugins The Web is
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Interacting with Plugins ❑ ❑ Ac
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Detecting Plugins As with most Web
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Interacting with Plugins } document
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Interacting with Plugins if (naviga
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Interacting with Plugins Figure 18-
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Interacting with Plugins } } else {
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Interacting with Plugins } var oApp
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Interacting with Plugins This examp
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Interacting with Plugins The JSObje
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Interacting with Plugins Back to th
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JavaScript-to-Flash communication F
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Interacting with Plugins Flash Cons
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Interacting with Plugins on(release
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Interacting with Plugins Lastly
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Summary Interacting with Plugins Th
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Chapter 19 If all three of these co
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Chapter 19 The preceding code displ
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Chapter 19 If the script isn’t si
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Chapter 19 This example places the
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Chapter 19 alert(sJavaScriptHello);
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Chapter 19 takes for the script to
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Chapter 19 One of the best tools fo
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Chapter 19 Use array and object lit
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Chapter 19 (window) MyFirstName = "
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Chapter 19 Remember Computer Scienc
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Chapter 19 Keep these algorithms in
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Chapter 19 } iSum += aValues[i]; i+
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Chapter 19 iLoopCount = Math.floor(
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Chapter 19 JavaScript gotchas JavaS
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Chapter 19 Use array and object lit
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Chapter 19 Using the JavaScript com
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The Evolution of JavaScript So far
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The Evolution of JavaScript You wil
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The Evolution of JavaScript Types N
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The Evolution of JavaScript This cl
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The Evolution of JavaScript Note th
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The Evolution of JavaScript As you
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The Evolution of JavaScript var oXm
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The Evolution of JavaScript var oXm
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The Evolution of JavaScript If you
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The Evolution of JavaScript In the
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Index Index SYMBOLS + (add operator
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avoiding hard-coded strings, 569-57
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close() method of document object,
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Konqueror/Safari, 239-241 language,
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try...catch statement, 423-427 vari
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F factory paradigm, 90-92 findPlugi
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history of browser window, 148 of J
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XML DOM support in Mozilla and, 455
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getAllResponseHeaders(), 495 getCom
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findPlugin() function, 538 helper a
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parsing error description of, 412-4
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eferences to object, 69 referencing
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size of array, 71 slice() method Ar
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MIME type, 537-538 range collapse,
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vector graphics, 133 Venkman breakp
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