javascript_tutorial

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Javascript In the following sections, we will have a few examples to demonstrate the usage of Math properties. Math-E This is an Euler's constant and the base of natural logarithms, approximately 2.718. Syntax Its syntax is as follows: Math.E Example Try the following example program. JavaScript Math E Property var property_value = Math.E document.write("Property Value is :" + property_value); Output Property Value is :2.718281828459045 276
Javascript Math-LN2 It returns the natural logarithm of 2 which is approximately 0.693. Syntax Its syntax is as follows: Math.LN2 Example Try the following example program. JavaScript Math LN2 Property var property_value = Math.LN2 document.write("Property Value is : " + property_value); Output Property Value is : 0.6931471805599453 Math-LN10 It returns the natural logarithm of 10 which is approximately 2.302. Syntax Its syntax is as follows: Math.LN10 277
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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 document.write("a - b =
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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 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 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 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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Page 242 and 243: Javascript var dt = new Date(); d
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Page 250 and 251: Javascript Output getUTCHours() :
Page 254 and 255: Javascript JavaScript getYear Met
Page 256 and 257: Javascript JavaScript setFullYear
Page 258 and 259: Javascript If you specify a number
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Page 262 and 263: Javascript setTime () Javascript da
Page 264 and 265: Javascript Date.setUTCFullYear(year
Page 266 and 267: Javascript document.write( dt );
Page 272 and 273: Javascript var dt = new Date(1993,
Page 274 and 275: Javascript toLocaleDateString () Ja
Page 278 and 279: Javascript For instances of Date,
Page 280 and 281: Javascript var dateobject = new
Page 282 and 283: Javascript Output 743850547000 Date
Page 284 and 285: Javascript minutes : An integer
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Page 292 and 293: Javascript JavaScript Math SQRT2 P
Page 296 and 297: Javascript First Test Value : 3.141
Page 298 and 299: Javascript JavaScript Math atan() M
Page 300 and 301: Javascript var value = Math.atan2(+
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Page 306 and 307: Javascript var value = Math.log(10
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Page 310 and 311: Javascript var value = Math.pow(7,
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Page 330 and 331: Javascript exec ( ) The exec method
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Javascript There are several DOMs i
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Javascript forms[ ] 9 An array of F
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Javascript Ex: document.close( ) op
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Javascript This is main title Click
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Javascript createElement( tagName)
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Javascript NOTE: This example r
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Javascript Specifies the loading st
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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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