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# js_tutorial

## Javascript var value =

Javascript var value = Math.atan2(+Infinity, -Infinity); document.write("Fourth Test Value : " + value ); Output First Test Value : 1.4056476493802699 Second Test Value : 0.16514867741462683 Third Test Value : 3.141592653589793 Fourth Test Value : 2.356194490192345 ceil ( ) This method returns the smallest integer greater than or equal to a number. Syntax Its syntax is as follows: Math.ceil ( x ) ; Parameter Details x: a number. Return Value Returns the smallest integer greater than or equal to a number. Example Try the following example program. JavaScript Math ceil() Method 290

Javascript var value = Math.ceil(45.95); document.write("First Test Value : " + value ); var value = Math.ceil(45.20); document.write("Second Test Value : " + value ); var value = Math.ceil(-45.95); document.write("Third Test Value : " + value ); var value = Math.ceil(-45.20); document.write("Fourth Test Value : " + value ); Output First Test Value : 46 Second Test Value : 46 Third Test Value : -45 Fourth Test Value : -45 cos ( ) This method returns the cosine of a number. The cos method returns a numeric value between -1 and 1, which represents the cosine of the angle. Syntax Its syntax is as follows: Math.cos ( x ) ; Parameter Details x: a number. Return Value Returns the cosine of a number. 291

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About the Tutorial JavaScript is a

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Bitwise Operators .................

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23. String ........................

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setUTCDate () .....................

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Checking for Plug-Ins .............

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1. OVERVIEW Javascript What is Java

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Javascript components, integrates w

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Javascript This function can be use

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Javascript The following example sh

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Javascript JavaScript in Chrome Her

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4. PLACEMENT Javascript There is a

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Javascript This code will

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5. VARIABLES Javascript JavaScript

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Javascript Within the body of a fun

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6. OPERATORS Javascript What is an

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Javascript the right operand, if ye

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Javascript Output (a == b) => false

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Javascript Output (a && b) => fal

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Javascript document.write("(a | b)

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Javascript Ex: C /= A is equivalent

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Javascript Set the variables to dif

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Javascript Function Undefined Null

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7. IF-ELSE Javascript While writing

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Javascript Output Qualifies for dri

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Javascript Try the following code t

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Javascript Syntax The objective of

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Javascript switch (grade) { case 'A

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Javascript Syntax The syntax of whi

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Javascript do{ Statement(s) to be e

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10. FOR LOOP Javascript The for Loo

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Javascript Current Count : 6 Curren

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Javascript Set the variable to diff

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Javascript Set the variable to

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Javascript Entering the loop 2 3 4

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Javascript Output Entering th

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13. FUNCTIONS Javascript A function

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Javascript Click the following butt

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Javascript Click the following but

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Javascript Use different parameters

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Javascript var variablename = funct

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14. EVENTS Javascript What is an Ev

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Javascript ....... onmouseove

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Javascript ondragenter script Trigg

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Javascript onplaying script Trigger

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15. COOKIES Javascript What are Coo

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Javascript Enter name: Outp

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Javascript Setting Cookies Expiry D

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Javascript Output Enter Cookie Na

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Javascript Example Try the followin

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Javascript setTimeout('Redirect()',

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17. DIALOG BOX Javascript JavaScrip

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Javascript Output Click the fol

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18. VOID KEYWORD Javascript void is

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Javascript Click the followin

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Javascript 2. If you do not want to

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Javascript 104

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Javascript Methods are useful for e

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Javascript Output Book title is

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Javascript User-defined objects /

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Javascript In the following section

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Javascript Click the following t

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Javascript Day of the Month must be

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Javascript alert("Value of bigNumbe

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Javascript constructor It returns a

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Javascript Try the following exampl

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Javascript document.write(""); docu

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Javascript document.write("num.toPr

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Javascript Returns the primitive va

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Javascript Returns the function tha

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Javascript Method toSource() toStri

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Javascript Output flag.toString

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23. STRING Javascript The String ob

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Javascript Try the following exampl

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Javascript concat() indexOf() lastI

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Javascript document.writeln("str.ch

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Javascript Argument Details string2

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Javascript lastIndexOf () This meth

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Javascript var index = str1.localeC

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Javascript substring. \$n or \$nn Whe

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Javascript Search () This method ex

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Javascript document.write( sliced )

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Javascript Try the following exampl

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Javascript Return Value Returns a s

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Javascript JavaScript String toLow

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Javascript var str = "Apples are r

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Javascript were in a tag sup() Cau

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Javascript blink () This method cau

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Javascript Try the following exampl

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Javascript JavaScript String font

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Javascript JavaScript String link(

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Javascript JavaScript String strik

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Javascript JavaScript String sup(

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Javascript input length prototype T

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Javascript Prototype The prototype

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Javascript push() reduce() reduceRi

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Javascript every () Javascript arra

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Javascript } var passed = [12, 5, 8

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Javascript Array.prototype.filter =

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Javascript } }; Example Try the fol

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Javascript var len = this.length; v

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Javascript join () Javascript array

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Javascript var from = Number(argume

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Javascript } var index = [12, 5, 8,

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Javascript Array.prototype.map = fu

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Javascript Its syntax is as follows

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Javascript var rv = arguments[1]; }

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Javascript } } throw new TypeError(

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Javascript } rv = this[i--]; break;

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Javascript } rv = fun.call(null, rv

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Javascript Output Removed element

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Javascript { } if (i in this && fun

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Javascript Return Value Returns a s

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Javascript toString () Javascript a

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25. DATE Javascript The Date object

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Javascript Return Value Returns the

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Javascript Date Methods Here is a l

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Javascript universal time. setUTCMo

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Javascript Syntax Its syntax is as

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Javascript Example Try the followin

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Javascript var dt = new Date(); d

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Javascript getMonth() : 11 getSecon

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Javascript Syntax Its syntax is as

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Javascript Try the following exampl

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Javascript NOTE: This example

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Javascript Part 3: JavaScript Advan

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Javascript Logical Errors Logic err

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Javascript Now let us try to catch

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Javascript Output Click the followi

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Javascript Click the following to s

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30. FORM VALIDATION Javascript Form

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Javascript Basic Form Validation Fi

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Javascript var emailID = document.m

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Javascript Manual Animation So let'

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Javascript } function moveRight(){

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Javascript It is not possible to s

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Javascript Output Checking for Plug

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Javascript //--> If you

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Javascript Error Messages in Firefo

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Javascript Use a JavaScript Debugge

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34. IMAGE MAP Javascript You can us

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Javascript Output You can feel the

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Javascript 6 plugins[] This propert

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Javascript document.write(" Browser

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