Professional JavaScript For Web Developers

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Chapter 8 Next, set up the variables for the different versions of the browsers: var isMinSafari1 = isMinSafari1_2 = false; var isMinKonq2_2 = isMinKonq3 = isMinKonq3_1 = isMinKonq3_2 = false; To determine the version of Safari, you can either interpret the build number or the Apple Web Kit version. As mentioned previously, Apple suggests you only use the Apple Web Kit information. Safari 1.0 uses Apple Web Kit version 85 whereas Safari 1.2 uses version 124. To extract this information, it is again necessary to use a regular expression. Looking at the user-agent strings at the beginning of this section, you see that the Apple Web Kit version can have decimals, but doesn’t always. This makes the regular expression a little bit more complicated than others in this chapter: var reAppleWebKit = new RegExp(“AppleWebKit\\/(\\d+(?:\\.\\d*)?)”); This expression uses a non-capturing group to include the decimal point and numbers after it. Other than that bit of trickery, the capturing group returns the version: if (isKHTML) { isSafari = sUserAgent.indexOf(“AppleWebKit”) > -1; isKonq = sUserAgent.indexOf(“Konqueror”) > -1; if (isSafari) { var reAppleWebKit = new RegExp(“AppleWebKit\\/(\\d+(?:\\.\\d*)?)”); reAppleWebKit.test(sUserAgent); var fAppleWebKitVersion = parseFloat(RegExp[“$1”]); } } isMinSafari1 = fAppleWebKitVersion >= 85; isMinSafari1_2 = fAppleWebKitVersion >= 124; To determine the version of Konqueror, the regular expression is also a little bit complicated because Konqueror uses version numbers with zero, one, or two decimal points. Because of this, multiple noncapturing groups are necessary to capture all the variations. var reKonq = new RegExp(“Konqueror\\/(\\d+(?:\\.\\d+(?:\\.\\d)?)?)”); This regular expression says to match the string “Konqueror”, followed by a forward slash, followed by at least one digit, which may or may not be followed by a decimal point and one or more digits, which may or may not be followed by another decimal point and one or more digits. After this value is extracted, it must be tested using the compareVersions() function in order to determine the minimal browser versions: if (isKHTML) { isSafari = sUserAgent.indexOf(“AppleWebKit”) > -1; isKonq = sUserAgent.indexOf(“Konqueror”) > -1; if (isSafari) { 240
Browser and Operating System Detection var reAppleWebKit = new RegExp(“AppleWebKit\\/(\\d+(?:\\.\\d*)?)”); reAppleWebKit.test(sUserAgent); var fAppleWebKitVersion = parseFloat(RegExp[“$1”]); isMinSafari1 = fAppleWebKitVersion >= 85; isMinSafari1_2 = fAppleWebKitVersion >= 124; } else if (isKonq) { } } var reKonq = new RegExp(“Konqueror\\/(\\d+(?:\\.\\d+(?:\\.\\d)?)?)”); reKonq.test(sUserAgent); isMinKonq2_2 = compareVersions(RegExp[“$1”], “2.2”) >= 0; isMinKonq3 = compareVersions(RegExp[“$1”], “3.0”) >= 0; isMinKonq3_1 = compareVersions(RegExp[“$1”], “3.1”) >= 0; isMinKonq3_2 = compareVersions(RegExp[“$1”], “3.2”) >= 0; In this section of the code, check whether the compareVersions() returns a value greater-than or equal to zero, which indicates that the versions are either equal (if it returns 0) or that the first version is greater than the second (if it returns 1). The detection for KHTML-based browsers is complete. You can either just use isKHTML if you don’t care which browser is being used, or use the more specific variables to determine the browser and version. Detecting Internet Explorer As discussed earlier, the IE user-agent string is quite unique. Recall the user-agent string for IE 6.0: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT) When you compare this to other browsers, two parts stand out as unique: “compatible” and “MSIE”. This is the basis for detecting IE: var isIE = sUserAgent.indexOf(“compatible”) > -1 && sUserAgent.indexOf(“MSIE”) > -1; This seems to be straightforward, but there is a problem. Take a second look at the Opera user-agent string when it is disguised as IE 6.0: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) Opera 7.54 See the problem? If you check for only “compatible” and “MSIE”, then Opera disguised as IE also returns true. The solution is to use the isOpera variable (explained previously) to ensure proper detection: var isIE = sUserAgent.indexOf(“compatible”) > -1 && sUserAgent.indexOf(“MSIE”) > -1 && !isOpera; Next, define variables for the different IE versions: var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = false; 241
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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
Page 217 and 218: DOM Basics var oOutput = document.g
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Page 222 and 223: Chapter 7 This regular expression m
Page 224 and 225: Chapter 7 var sToChange = “The sk
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Page 236 and 237: Chapter 7 In this, reRedOrBlack mat
Page 238 and 239: Chapter 7 Lookaheads Sometimes you
Page 240 and 241: Chapter 7 It is, in fact, easier to
Page 242 and 243: Chapter 7 reB.exec(sToMatch); alert
Page 244 and 245: Chapter 7 Common Patterns On the We
Page 246 and 247: Chapter 7 The isValidDate() functio
Page 248 and 249: Chapter 7 } } } bIsOdd = !bIsOdd; A
Page 250 and 251: Chapter 7 Validating e-mail address
Page 253 and 254: Browser and Operating System Detect
Page 261 and 262: The important things to note in thi
Page 265 and 266: Detecting Opera The simplest and be
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Page 289 and 290: All about Events JavaScript’s int
Page 291 and 292: All about Events document 3 bubblin
Page 293 and 294: All about Events Some have also cal
Page 295 and 296: Using this method of assignment, th
Page 297 and 298: All about Events var oDiv = documen
Page 299 and 300: Properties/methods Internet Explore
Page 301 and 302: All about Events Property/Method Ty
Page 303 and 304: Detecting Shift, Alt, Ctrl To detec
Page 305 and 306: Getting the target The object at th
Page 307 and 308: All about Events When the button is
Page 309 and 310: All about Events Using the mouseove
Page 311 and 312: All about Events if (oEvent.fromEle
Page 313 and 314: All about Events Event properties F
Page 315 and 316: All about Events ❑ ❑ ❑ ❑ Th
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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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Chapter 10 Comparing IE ranges Rang
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Forms and Data Integrity Form eleme
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Forms and Data Integrity Comments:
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Forms and Data Integrity //is the f
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You can actually mimic the behavior
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allowed in the text box. So to crea
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Forms and Data Integrity Select T
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Forms and Data Integrity }; } } } }
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Allowing/blocking characters in tex
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Forms and Data Integrity main diffe
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Forms and Data Integrity You must u
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Forms and Data Integrity You may as
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Forms and Data Integrity Because bo
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Forms and Data Integrity Even thoug
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Forms and Data Integrity This metho
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Forms and Data Integrity TextUtil.a
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Forms and Data Integrity The autosu
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Chapter 12 }; return -1; } else if
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Chapter 12 Smith Johnson Hend
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Chapter 12 This section of code cre
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Chapter 12 Smith John Johnson Bet
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Chapter 12 Last Name First Name
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Chapter 12 Creating a conversion fu
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Chapter 12 Using this methodology,
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Chapter 12 The concept Keep in mind
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Chapter 12 } }; if (vValue1 < vValu
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Drag and Drop One of the biggest im
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Drag and Drop } Try dragging th
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Drag and Drop function handleDragDr
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Drag and Drop In this example, all
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Drag and Drop This is essentially t
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Drag and Drop oEvent.dataTransfer.e
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Drag and Drop } } oEvent.srcElement
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Drag and Drop function handleMouseD
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Drag and Drop function handleMouseU
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Drag and Drop } return (iX >= iX1 &
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Drag and Drop The zDraggable object
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Drag and Drop position: absolute; l
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Chapter 14 some other reason, perha
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Chapter 14 Figure 14-2 The other op
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Chapter 14 The problem with IE/Mac
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Chapter 14 Figure 14-7 Opera 7 (all
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Chapter 14 In this example, an exce
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Chapter 14 Handling syntax errors T
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Chapter 14 Mozilla’s extensions t
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Chapter 14 Determining the type of
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Chapter 14 Note that the check for
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Chapter 14 Mozilla, Safari, and Ope
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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
Page 659 and 660:
XML DOM support in Mozilla and, 455
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getAllResponseHeaders(), 495 getCom
Page 663 and 664:
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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Professional JavaScript For Web Developers

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