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js_tutorial

Javascript Ex:

Javascript Ex: document.close( ) open( ) 3 Deletes existing document content and opens a stream to which new document contents may be written. Returns nothing. Ex: document.open( ) write( value, ...) 4 Inserts the specified string or strings into the document currently being parsed or appends to document opened with open( ). Returns nothing. Ex: document.write( value, ...) writeln( value, ...) 5 Identical to write( ), except that it appends a newline character to the output. Returns nothing. Ex: document.writeln( value, ...) Example We can locate any HTML element within any HTML document using HTML DOM. For instance, if a web document contains a form element, then using JavaScript, we can refer to it as document.forms[0]. If your Web document includes two form elements, the first form is referred to as document.forms[0] and the second as document.forms[1]. Using the hierarchy and properties given above, we can access the first form element using document.forms[0].elements[0] and so on. Here is an example to access document properties using Legacy DOM method. Document Title

Javascript { var ret = document.title; alert("Document Title : " + ret ); var ret = document.URL; alert("Document URL : " + ret ); var ret = document.forms[0]; alert("Document First Form : " + ret ); var ret = document.forms[0].elements[1]; alert("Second element : " + ret ); } //--> This is main title Click the following to see the result: Output 331

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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 Output getUTCHours() :

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    Javascript Syntax Its syntax is as

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    Javascript JavaScript getYear Met

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    Javascript JavaScript setFullYear

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    Javascript If you specify a number

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    Javascript monthValue : An integ

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    Javascript setTime () Javascript da

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    Javascript Date.setUTCFullYear(year

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    Javascript document.write( dt );

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    Javascript Try the following exampl

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    Javascript Example Try the followin

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    Javascript var dt = new Date(1993,

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    Javascript toLocaleDateString () Ja

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    Javascript Syntax Its syntax is as

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    Javascript For instances of Date,

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    Javascript var dateobject = new

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    Javascript Output 743850547000 Date

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    Javascript minutes : An integer

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    Javascript In the following section

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    Javascript Example Try the followin

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