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Remember that these buttons (indeed, all form elements) can only appear within a tag. While Internet Explorer may let you get away with using form elements anywhere in a document, browsers enforcing standards will not render form field elements outside a tag. Image Buttons The simple gray appearance provided by standard (X)HTML Submit, Reset, and generic buttons is often not desirable. A good approach to livening up your buttons is to apply CSS to them. However, some designers instead use image buttons. There are a few ways to create image buttons in markup. The first is simply to wrap an tag within a link and trigger some JavaScript, for example, Alternatively, you can use the form field. Under (X)HTML, such fields are used to create graphical Submit buttons. For example, to create a submission button consisting of an image, you might use
src="../images/button.gif" alt="Submit" />> The unique properties of image buttons are discussed in Table 14-4. In particular, notice that image maps can be used with image buttons via the usemap attribute. Yet, interestingly, regardless of the use of a usemap attribute, image-based Submit buttons always send an x and y value in during submission, indicating the pixel coordinates of the image clicked. Table 14-4: Additional Properties of Inputs of Type "image" Property Description Alt Text alternative of the button for non-visual browsers Src URL of the image to display as a button UseMap Indicates the button is a client-side image map Note Despite being defined since HTML 4, the image button is often not supported by older browsers. Even relatively recent browsers such as Internet Explorer 5 do not properly recognize it. Generalized Buttons HTML 4 and XHTML support the tag, which is much more flexible than and provides the possibility of visually richer buttons. The basic syntax of the tag is presented here: Two examples of in use are shown here: Yes sir, I am a submit button! Renderings unfortunately might not be as expected: Supporting the basic syntax and previous example, DOM Level 1 defines the expected properties for the HTMLButtonElement object shown in Table 14-5.
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JavaScript 2.0-The Complete Referen
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JavaScript 2.0-The Complete Referen
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Serrato, Darlene Hernandez, Michele
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First JavaScript document.write("
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In this case, the tag happens to s
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Ready start alert("First Script
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Script Hiding Most browsers tend to
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alert("Your JavaScript is on!
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Event Trigger Example A re
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Notice that the src attribu
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Figure 1-6: JavaScript console used
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Table 1-1: Browser Versions and Jav
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A scripting language is a language
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This is not a problem in itself. Th
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y a linebreak without causing an er
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Being weakly typed is both a blessi
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myArray[1] = 5; myArray[2] = "Thoma
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To compare objects, JavaScript prov
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} else { } x = x + 1; First, the co
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do { document.write(x); document.wr
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This code declares a function named
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document.write("This text is no
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*/ invoke it as follows: var y = sq
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Part II: Core Language Chapter 3: D
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throughout both the chapter and the
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The other important special value i
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Things get really messy if you work
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Close examination of the table of e
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document.write("Note how newlines (
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Note Some Netscape browsers do not
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Methods of objects are accessed in
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The typeof Operator If you‘re cur
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Number "NaN", "0", or the string re
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A variable‘s name should give som
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execute. This context contains the
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} function innerFunction() { } aler
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context, the interpreter would firs
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y = y - 1 is fine. But if you make
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Operators JavaScript supports a var
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There is one further wrinkle with t
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Table 4-3 shows the bitwise operato
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Table 4-5: Shorthand Assignment wit
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Comparison Operators A comparison e
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"thomas" >> "fritz" "aaaa" >> "a" "
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var a,b,c,d; a = (b=5, c=7, d=56);
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alert(myArray[2]); alert(myArray[3]
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Table 4-9: Precedence and Associati
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JavaScript supports a core set of s
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else if (expression2) statement or
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Figure 4-1: Logical expressions can
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else if (yourGrade == 'D') alert("N
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} case 'C': alert("You passed!"); c
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{ } // do something Last, an import
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document.write("Start the countdown
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} document.write("Outerloop: "+i+""
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The with statement indicates an obj
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alter program flow. A variety of lo
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Functions do not have to receive on
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Functions always return some form o
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document.write("In function fiddle
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} x = 7; document.write("x="+x+"");
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However, more likely, we purposeful
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document.write("Entering testFuncti
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"statements for function body"); As
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A similar kind of nameless function
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The result shown next demonstrates
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Note that this isn‘t a terribly r
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Using Functions Before concluding t
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} if (addTwo.arguments.length == 2)
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familiar to anyone who has programm
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creates String objects while the Ar
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The result is As you can see, the s
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Figure 6-1: Enumerating properties
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statement; Using with lets you refe
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Declare a function taking two argum
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Table 6-2: Properties and Methods C
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Notice that we named the method att
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If the way the robot object has bee
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Object-Oriented JavaScript Before j
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} this.hasJetpack = true; This exam
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function Robot(flying, action) { }
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var feature = guard.feature; var ca
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var firstArray = []; var secondArra
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The effect is as if no element had
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var myValues = new Array(); myValue
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stack.pop(); // ["first", 10] Retur
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Unlike with the push() and shift()
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It takes a variable number of argum
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If you want to be more succinct, yo
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} { } var last = this[this.length-1
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Table 7-1: Arguments to the Date()
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document.write("The current date :
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If you are not sure whether the par
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Table 7-2: Globally Available Metho
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Table 7-4: Methods Provided by the
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var s = new String(); var headline
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var s = "JavaScript" + " is" + " a"
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Table 7-6: HTML-Releated String Met
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This chapter is an introduction to
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expressions are designed to be very
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These characters are ^ and $, indic
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Table 8-2: Regular Expression Escap
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var pattern = /ab+c/; is read as
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var pattern = /[0-9]+/; This regula
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would match ―abcx7d‖ or ―abc_
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You could use the following regular
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document.writeln("result.lastIndex
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} // if we have a match, print info
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Table 8-7: Static Properties of the
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var stringwithdelimits = "10 / 3 /
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Non-capturing Parentheses JavaScrip
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addresses instead of domain names (
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1. The core JavaScript language (e.
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For the sake of brevity, some detai
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""); document.write("Page Colors");
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Figure 9-4: Some Document propertie
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using the traditional JavaScript
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The onclick attribute of the tag
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{ } var theirname=document.myForm.u
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Greeting: The previous examp
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Table 9-4: New Document Properties
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Netscape 4 Layer Example An example
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Figure 9-8: Internet Explorer 4 obj
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finds tag with id or name = myHeadi
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Table 9-7: Some New Properties for
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onclick="document.all['heading1'].s
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style, and content) to a programmin
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var feature; var version; for (i=0;
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The most important thing to think a
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Before moving on, we need to introd
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Table 10-2: DOM Node Properties DOM
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currentElement = currentElement.fir
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DOM Test Heading
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} } else alert("No parent"); break;
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onclick="currentElement=document.do
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Collection Description >document.an
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the necessary references. Let‘s s
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} if (node.parentNode) { } //-->> i
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} function doReplace() { } var repl
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Table 10-5: Text Node Manipulation
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onclick="temp = textNode.splitText(
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7
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-->> Simple DOM HTML Editor &n
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It would be easy enough to mod
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Table 10-6: CSS Property-to-DOM Pro
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"http://www.w3.org/TR/xhtml1/DTD/xh
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Style: normal italic oblique Wei
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onchange="theElement.style.fontSize
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Height: Width: &nbs
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theElement = document.getElementByI
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This is a paragraph This is a parag
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override them with local rules. Und
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} if (styleSheet.cssRules[0]) { } s
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There are a few things to study car
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var myWalker = document.createTreeW
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While the Traversal API is not wide
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adding content to the document. Bec
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inner/outer Tester This is a t
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>
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Figure 10-6: Using document.all[] a
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some consistency to the mad world t
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Table 11-2: Basic Events and Their
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ondblclick: onfocus: onkeydown:
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Browsers might support events othe
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onbeforedeactivate Fires just befor
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oncut Fires when selected content i
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ondrop Fires on a valid drop target
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onpropertychange Fires whenever a p
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page Non-standard Event Binding in
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this is to assign handlers after th
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Table 11-4: Effect of Returning fal
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One major difference between versio
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if you check your JavaScript consol
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To set up event capturing, use the
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keep tabs on what happened to an ev
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We may be in the gutter, but some o
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Table 11-9: Behavior of Internet Ex
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Table 11-9: Behavior of Internet Ex
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Preventing Bubbling You can stop ev
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The DOM2 Event model specification
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document.getElementById('myText').r
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Alt Key down? Control Key down? M
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The result of a click is shown in
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when the user activates the pull-do
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function killClicks(event) { } even
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-->> The killClick handler is regi
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startListen(); //-->> Current Nod
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Table 11-18 summarizes the major fe
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Part IV: Using JavaScript Chapter 1
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window.confirm(string); or simply c
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value that contains the value enter
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Opening and Closing Generic Windows
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in some browsers, while others may
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Table 12-1: Feature Parameter Value
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featurestring += "width="+document.
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Left: (IE) ScreenX: ScreenY: (Ne
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Figure 12-1: Simple window and its
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} } //-->> else customAlert("Bor
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} } myWindow.focus(); // Make the w
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windowHTML += ""; windowHTML += "An
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windowname is the name of the windo
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function moveIt() { if ((window.myW
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myWindow.moveBy(0,10);" />> X: Y:
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It is also possible to access parse
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5,4,3,2,1...BOOM Browser Self-De
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message = message.substring(1, mess
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Event Description onafterprint Even
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parent.frames[0].name would print o
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" var i = 0; msg += "Window: "+ win
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Two Frames within the naviga
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While inline frames seem to be a si
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window.onload = frameBuster; // -->
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Variables
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Back to previous page While Ja
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Interested readers are enc
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Table 13-1: Document Properties Rel
Page 447 and 448: Unvisited Link Click to show active
Page 449 and 450: Location and Related Properties The
Page 451 and 452: str += "but remember the rules of X
Page 453 and 454: You also can read the target proper
Page 456 and 457: onclick="document.myform.field1.val
Page 458 and 459: } str += "border: "+theImage.border
Page 460 and 461: (document.all[10]) or by name (docu
Page 462 and 463: Table 13-4: Common DOM Properties f
Page 464 and 465: All other (
Page 466 and 467: Table 13-7: (X)HTML Elements Associ
Page 468 and 469: Table 13-7: (X)HTML Elements Associ
Page 470 and 471: } } var newText = document.createTe
Page 472 and 473: (X)HTML Table Inspector Test T
Page 474 and 475: Jet Packs Economy JP-3455E6
Page 476 and 477: above below border box hsides vside
Page 478 and 479: for (i = 0; i > document.writeln("R
Page 480 and 481: onclick="theTable.insertRow(documen
Page 482 and 483: } var colNumber = parseFloat(column
Page 484 and 485: } var numberRowsInTable = theTable.
Page 486 and 487: onclick="doCellModification(documen
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Page 490 and 491: object. As with all document object
Page 492 and 493: Just as the Document contains a col
Page 494 and 495: } document.write("length: "+length+
Page 496 and 497: property. In short, it is most usef
Page 500 and 501: Table 14-5: Properties of the HTMLB
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Page 504 and 505: Closely related to inputs of type "
Page 506 and 507: Common Field Properties
Page 508 and 509: Of course, the preceding script
Page 510 and 511: Checkboxes and radio buttons (―ra
Page 512 and 513: Yes: No: Maybe: does not, as it
Page 514 and 515: yes: no: maybe: onclick="a
Page 516 and 517: -->> Hidden Fields Hidden form f
Page 518 and 519: Trainer Friend Cook An HTMLSelectEl
Page 520 and 521: } //-->> alert(msg); Option 1 Op
Page 522 and 523: cities["Australia"] = ["Sydney", "M
Page 524 and 525: Brisbane The previous example il
Page 526 and 527: eserved keyword. We‘ll see anothe
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Page 530 and 531: } for (i = 0; i
Page 532 and 533: Abstracting Form Validation The pr
Page 534 and 535: } if (/[^@]+@[^@]+/.test(s)) return
Page 536 and 537: if (!isInteger(s)) return false; va
Page 538 and 539: } { } alert("Email may not be empty
Page 540 and 541: } } { } case 'notblank': if (isEmpt
Page 542: Form Validation via Hidden Fields A
Page 545 and 546: } // Check for special characters l
Page 547 and 548: A final observation that escapes ma
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JavaScript can be used to turn disa
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Figure 14-4: Rendering of dynamic f
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} } return true; else { } window.st
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Widgets: @ 1.50 each Gadgets: @
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calculated fields. Also note that,
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Figure 15-1: Manipulating Image pro
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Complete: Height: Hspace: Nam
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} } } alt.value = i.alt; border.val
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{ } var i = new Image(); i.src = ur
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The complete working example is sho
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...Page content here... Give
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{ } var abouton = new Image(); abou
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Figure 15-2
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With CSS, you can go even furthe
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Absolutely positioned elements not
Page 583 and 584:
color of the region to orange as se
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} } return(getElement(layerName, la
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} /* set the width of layer named l
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* return the object for the passed
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* set the x-coordinate of layer nam
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} else if (opera) else theLayer.sty
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} { } theLayer.document.write(conte
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z: Height: Width: />>
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Figure 15-3: Testing our cross-brow
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object, enabling control of the con
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} ("") : ("lightblue")); // IE can'
Page 605 and 606:
DOM Level 2 style of event listener
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#mirror {border-style: solid; borde
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Notice how, in the preceding examp
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What's my style? Take 2 p { text-
Page 613 and 614:
Figure 15-6: A simple DHTML page tr
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} if (clipleft A point of intere
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obots!');" 'If you like our domes,
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{ } currentX = getX('ufo'); if (cur
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} if (layerobject) else return(pars
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} /* move left until boundary */ fu
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We could modify the animation
Page 629 and 630:
should not be placed within a form
Page 631 and 632:
Select Navigation
Page 633 and 634:
E-commerce ------------------------
Page 635 and 636:
JavaScriptRef
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Yahoo Teoma MSN DMOZ E-commerce S
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JavaScript libraries on the Web suc
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} } { alert("Main window went away.
Page 645 and 646:
Although the following code is writ
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{ // else move it 5 more pixels in
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Figure 16-5: The slide-in menu in a
Page 652 and 653:
else if (document.all) // else if i
Page 654 and 655:
Bottom of the page As with all
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application of this technology is t
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When you assign a new cookie value
Page 660 and 661:
array else { // extract its value }
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a user with the cookie ―username=
Page 664 and 665:
If the user doesn‘t have cookies
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} } } value = document.cookie.subst
Page 668 and 669:
Where a calculator on the ENIAC is
Page 670 and 671:
Enter some text to store: When
Page 672 and 673:
Table 17-1: Navigator Properties fo
Page 674 and 675:
Notice already from Figure 17-1 th
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document.write("Browser Not Known:
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Error: No JavaScript Support E
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// JS 1.5 features var version="1.
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else alert("You have Flash!"); aler
Page 684 and 685:
A rendering of the example is show
Page 686 and 687:
* nasty hack to deal with doctype s
Page 689 and 690:
Under browsers like Internet Explor
Page 691 and 692:
Page 693 and 694:
Figure 17-2: Explorer’s client ca
Page 695 and 696:
Given that some buttons can b
Page 697 and 698:
Given the danger involved in settin
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Part V: Advanced Topics Chapter Lis
Page 701 and 702:
Your browser does not support Java!
Page 703 and 704:
} public void paint(Graphics myScre
Page 705 and 706:
Your browser does not support Java!
Page 707 and 708:
Plug-ins are persistent in the brow
Page 709 and 710:
{ for (var i=0; i
Page 711 and 712:
{ for (var i=0; i
Page 713 and 714:
Suppose you have written some custo
Page 715 and 716:
} function changeFrame(i) { } if (!
Page 717 and 718:

Page 719 and 720:
Whereas Java applets are downloaded
Page 721 and 722:
Browsers that do not understand wi
Page 723 and 724:
function play() { } if (!dataReady)
Page 725 and 726:
> // you can write an image in he
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This chapter served as an introduct
Page 729 and 730:
} var img = new Image(); img.src =
Page 731 and 732:
The HTTP response code 204 ―No Co
Page 733 and 734:
{ } // If we've already got a reque
Page 735 and 736:
User: Deagol (check online status)
Page 737 and 738:
One fundamental vehicle enabling se
Page 739 and 740:
{ var params = "numstories=" Note O
Page 741 and 742:
RPC Spellchecker
Page 743 and 744:
+ } if (rpcResult === true) else al
Page 745 and 746:
} var newScript = document.createEl
Page 747 and 748:
Iframe RPC The Server Respon
Page 749 and 750:
echo ""; ?>> In order to see this i
Page 751 and 752:
The following example illustrates t
Page 753 and 754:
The capability to update a page wit
Page 755 and 756:
Figure 20-1: Well-formed XML under
Page 757 and 758:
in which a document‘s logical str
Page 759 and 760:
&cola; We could easily have just
Page 761 and 762:
XSL Test Note In order to
Page 763 and 764:
Whereas the preceding example is ra
Page 765 and 766:
(123) 456-2222 fli@democompany.com
Page 767 and 768:
You can reference the style
Page 769 and 770:
directory {display: block;} employe
Page 771 and 772:
MathML Below x + y 2 k +
Page 773 and 774:
...HTML content... or you can refe
Page 775 and 776:
Once you bind data into a document,
Page 777 and 778:
We could further use the DOM proper
Page 779 and 780:
{ var rootElement = xmldoc.document
Page 781 and 782:
if (type == 1) { // open tag dump("
Page 783 and 784:
-->> XML Document: Name: Title
Page 785 and 786:
xmldoc.async = false; xmldoc.load("
Page 787 and 788:
Name: Title: Phone: Email:
Page 789 and 790:
Sales Executive (543) 555-5672 jone
Page 791 and 792:
*/ var title = document.getElementB
Page 793 and 794:
* append completed record to the do
Page 795 and 796:

Page 797 and 798:
} //-->> /* append completed record
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A fake entry http://www.javascriptr
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a:hover {color:#FF9900;} #feedOutpu
Page 803 and 804:
var itemURL = itemList[i].getElemen
Page 805 and 806:
If you inspect the preceding exam
Page 807 and 808:
Table 21-2: Relationship Between Mi
Page 809 and 810:
Table 21-4: Proprietary Extensions
Page 811 and 812:
of access to select one of the memb
Page 813 and 814:
The result is shown in Figure 21-1.
Page 815 and 816:
You must also indicate the comments
Page 817 and 818:
Table 21-7: Some Proprietary Featur
Page 819 and 820:
encountered. The browser generally
Page 821 and 822:
Two problematic questions are how t
Page 823 and 824:
HTML Applications HTML Applications
Page 825 and 826:
} var fso, filehandle; //-->> fso =
Page 827 and 828:
E, Elephant F, Fox G, Girl H, Hat T
Page 829 and 830:
Figure 21-3: Data Binding example u
Page 831 and 832:
Figure 21-5: Using dynamic properti
Page 833 and 834:
arbitrary elements in a page. HTCs
Page 835:
var originalColor; function activat
Page 838 and 839:
Table 21-12: Some Default Behaviors
Page 840 and 841:
Figure 21-6: Pop-up windows give yo
Page 842 and 843:
There are numerous JScript capabili
Page 844 and 845:
Note Interested readers can learn m
Page 846 and 847:
Table 21-17: Components of Mozilla
Page 848 and 849:
comes from a trusted source. Such c
Page 850 and 851:
even if the page in that window was
Page 852 and 853:
of incorporation, domain name owner
Page 854 and 855:
Figure 22-2: Categorizing sites int
Page 856 and 857:
The column of Table 22-3 indicating
Page 858 and 859:
function doitagain() { } document.w
Page 860 and 861:
escape(document.cookie); This scri
Page 862 and 863:
Although some defensive programming
Page 864 and 865:
Figure 23-1: Enabling notification
Page 866 and 867:
Table 23-2: Common JavaScript Error
Page 868 and 869:
if (debugging) alert("Returned from
Page 870 and 871:
Figure 23-4: Using Error.stack to g
Page 872 and 873:
} document.writeln(x); document.wri
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Figure 23-7: Enabling script debugg
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you can replace or suppress the err
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if (window.opener && !window.opener
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} return true; window.onerror = rep
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You can also create instances of th
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if (typeof(a) != "number" || typeof
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The appearance of a browser to supp
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efresher. We now turn our attention
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teksasliunescape(teks);document.wri
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Standard Version Description ECMASc
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Table A-7: Primitive JavaScript Dat
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Table A-11: Result of Type Conversi
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Object Description Array Provides a
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new Function(["arg1", ["arg2"], …
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Table A-21: Binary and Self-assignm
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A JavaScript implementation should
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} where statements is composed of z
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switch (expression) { } case val1:
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document.write(i+""); i++; } while
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Table A-27: Some Regular Expression
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Table A-32: Advanced Regular Expres
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Figure B-2: The traditional object
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Figure B-6: The Internet Explorer 4
Page 923 and 924:
className String holding value of t
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eadyState Read-only string containi
Page 927 and 928:
fireEvent(handler [, event]) Causes
Page 929 and 930:
setExpression(property, expression
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Supported in IE4+, MOZ/N6+, DOM1. N
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This object has the following prope
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In Netscape 4.0-4.05 (JavaScript 1.
Page 937 and 938:
ig, HTMLElement (Document Object) T
Page 939 and 940:
constructor Reference to the constr
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caption, HTMLTableCaptionElement (D
Page 943 and 944:
clipboardData (Proprietary Browser
Page 945 and 946:
"move", "copyLink", "copyMove", "li
Page 947 and 948:
setDate(dayOfMonth) Sets the day of
Page 949 and 950:
Supported in Internet Explorer 4+,
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Document (Document Object) The Docu
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styleSheets[] Collection of styleSh
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Methods This object has only the me
Page 957 and 958:
The message string defines the text
Page 959 and 960:
properties ALT_MASK, CONTROL_MASK,
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setCapture([containerCapture]) Caus
Page 963 and 964:
onblur Fires when an element loses
Page 965 and 966:
Netscape Extended Events The follow
Page 967 and 968:
onresizeend Fires when the user fin
Page 969 and 970:
This object has the following metho
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Support Supported in Internet Explo
Page 973 and 974:
Constructor This object cannot be i
Page 975 and 976:
Individual entries in the history a
Page 977 and 978:
scrolling String specifying whether
Page 979 and 980:
"hidden", "image", and "button". Tr
Page 981 and 982:
Despite being a tag found within a
Page 983 and 984:
This object has the following prope
Page 985 and 986:
Generally speaking, reserved words
Page 987 and 988:
Index Symbols -- (decrement) operat
Page 989 and 990:
ActiveXObject, 655-657, 772 addEven
Page 991 and 992:
properties, 775 removing elements,
Page 993 and 994:
ody object, HTMLBodyElement, 780-78
Page 995 and 996:
dataTransfer, 788-789 external, 817
Page 997 and 998:
passing composite types, 115-116 pa
Page 999 and 1000:
speed of writing, 724 value of comm
Page 1001 and 1002:
overview of, 522 parsing, 525-526 r
Page 1003 and 1004:
undefined, 58-60 dataTransfer objec
Page 1005 and 1006:
ollovers, 498-499 sparing use of DH
Page 1007 and 1008:
document objects, 761-769 abbr, 771
Page 1009 and 1010:
optGroup, 851 option, 851-852 overv
Page 1011 and 1012:
document tree navigation, browser d
Page 1013 and 1014:
dynamic typing, 29-31, 155 Index_E
Page 1015 and 1016:
special characters, 54-55 strings,
Page 1017 and 1018:
defined, 297 overview of, 298 Event
Page 1019 and 1020:
advantages/disadvantages, 16 functi
Page 1021 and 1022:
properties, 417-419 form validation
Page 1023 and 1024:
passing primitive types by value, 1
Page 1025 and 1026:
HTML applications (HTA), 657-660, 6
Page 1027 and 1028:
Radio, 856-857 Reset, 859-860 submi
Page 1029 and 1030:
events, 814-817 hiding proprietary
Page 1031 and 1032:
one-way communication with servers,
Page 1033 and 1034:
Java applets accessing in JavaScrip
Page 1035 and 1036:
keyboard masking, 453-454 keywords
Page 1037 and 1038:
syntax, 737-738 variable declaratio
Page 1039 and 1040:
methods common to all objects, 145-
Page 1041 and 1042:
owser supporting, 134 javaEnabled(
Page 1043 and 1044:
null data type conversion of, 734 d
Page 1045 and 1046:
objects, 133-158 as associative arr
Page 1047 and 1048:
comparison. see comparison operator
Page 1049 and 1050:
IE security zones, 686-690 Mozilla,
Page 1051 and 1052:
prototypes, extending Array objects
Page 1053 and 1054:
string methods, 211-214 syntax, 748
Page 1055 and 1056:
RPCs (remote procedure calls) callb
Page 1057 and 1058:
ActiveXObject, 655-656 browser issu
Page 1059 and 1060:
square brackets ([ ]), 93, 198 src
Page 1061 and 1062:
functions made accessible by, 135 m
Page 1063 and 1064:
logical operators, 740 loops, 746-7
Page 1065 and 1066:
methods common to all objects, 145-
Page 1067 and 1068:
Index_V V valid XML, 607-608 value,
Page 1069 and 1070:
document property, 134 DOM methods
Page 1071 and 1072:
eference book, 6 referencing elemen
Page 1073 and 1074:
List of Figures Chapter 1: Introduc
Page 1075 and 1076:
Figure 11-1: A click on the bold te
Page 1077 and 1078:
Figure 20-7: XHTML with MathML and
Page 1079 and 1080:
List of Tables Chapter 1: Introduct
Page 1081 and 1082:
Table 10-3: DOM Level 0 Collections
Page 1083 and 1084:
Table 15-2: Position-Related Proper
Page 1085 and 1086:
Table A-13: Result of Type Conversi
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