javascript_tutorial

Recommendations

Info

18. VOID KEYWORD Javascript void is an important keyword in JavaScript which can be used as a unary operator that appears before its single operand, which may be of any type. This operator specifies an expression to be evaluated without returning a value. Syntax The syntax of void can be either of the following two: Example 1 The most common use of this operator is in a client-side <strong>javascript</strong>: URL, where it allows you to evaluate an expression for its side-effects without the browser displaying the value of the evaluated expression. Here the expression alert ('Warning!!!') is evaluated but it is not loaded back into the current document: 98
Javascript Click the following, This won't react at all... Click me! Output Click the following, This won't react at all... Click me! Example 2 Take a look at the following example. The following link does nothing because the expression "0" has no effect in JavaScript. Here the expression "0" is evaluated, but it is not loaded back into the current document. Click the following, This won't react at all... Click me! Output Click the following, This won't react at all... Click me! Example 3 Another use of void is to purposely generate the undefined value as follows. 99
Page 2 and 3:
About the Tutorial JavaScript is a
Page 4 and 5:
Bitwise Operators .................
Page 6 and 7:
23. String ........................
Page 8 and 9:
setUTCDate () .....................
Page 10 and 11:
Checking for Plug-Ins .............
Page 12 and 13:
1. OVERVIEW Javascript What is Java
Page 14 and 15:
Javascript components, integrates w
Page 16 and 17:
Javascript This function can be use
Page 18 and 19:
Javascript The following example sh
Page 20 and 21:
Javascript JavaScript in Chrome Her
Page 22 and 23:
4. PLACEMENT Javascript There is a
Page 24 and 25:
Javascript This code will
Page 26 and 27:
5. VARIABLES Javascript JavaScript
Page 28 and 29:
Javascript Within the body of a fun
Page 30 and 31:
6. OPERATORS Javascript What is an
Page 32 and 33:
Javascript document.write("a - b =
Page 34 and 35:
Javascript the right operand, if ye
Page 36 and 37:
Javascript Output (a == b) => false
Page 38 and 39:
Javascript Output (a && b) => fal
Page 40 and 41:
Javascript document.write("(a | b)
Page 42 and 43:
Javascript Ex: C /= A is equivalent
Page 44 and 45:
Javascript Set the variables to dif
Page 46 and 47:
Javascript Function Undefined Null
Page 48 and 49:
7. IF-ELSE Javascript While writing
Page 50 and 51:
Javascript Output Qualifies for dri
Page 52 and 53:
Javascript Try the following code t
Page 54 and 55:
Javascript Syntax The objective of
Page 56 and 57:
Javascript switch (grade) { case 'A
Page 58 and 59: Javascript Syntax The syntax of whi
Page 60 and 61: Javascript do{ Statement(s) to be e
Page 62 and 63: 10. FOR LOOP Javascript The for Loo
Page 64 and 65: Javascript Current Count : 6 Curren
Page 66 and 67: Javascript Set the variable to diff
Page 68 and 69: Javascript Set the variable to
Page 70 and 71: Javascript Entering the loop 2 3 4
Page 72 and 73: Javascript Output Entering th
Page 74 and 75: 13. FUNCTIONS Javascript A function
Page 76 and 77: Javascript Click the following butt
Page 78 and 79: Javascript Click the following but
Page 80 and 81: Javascript Use different parameters
Page 82 and 83: Javascript var variablename = funct
Page 84 and 85: 14. EVENTS Javascript What is an Ev
Page 86 and 87: Javascript ....... onmouseove
Page 88 and 89: Javascript ondragenter script Trigg
Page 90 and 91: Javascript onplaying script Trigger
Page 92 and 93: 15. COOKIES Javascript What are Coo
Page 94 and 95: Javascript Enter name: Outp
Page 96 and 97: Javascript Setting Cookies Expiry D
Page 98 and 99: Javascript Output Enter Cookie Na
Page 100 and 101: Javascript Example Try the followin
Page 102 and 103: Javascript setTimeout('Redirect()',
Page 104 and 105: 17. DIALOG BOX Javascript JavaScrip
Page 106 and 107: Javascript Output Click the fol
Page 110 and 111: Javascript Click the followin
Page 112 and 113: Javascript 2. If you do not want to
Page 114 and 115: Javascript 104
Page 116 and 117: Javascript Methods are useful for e
Page 118 and 119: Javascript Output Book title is
Page 120 and 121: Javascript User-defined objects /
Page 122 and 123: Javascript In the following section
Page 124 and 125: Javascript Click the following t
Page 126 and 127: Javascript Day of the Month must be
Page 128 and 129: Javascript alert("Value of bigNumbe
Page 130 and 131: Javascript constructor It returns a
Page 132 and 133: Javascript Try the following exampl
Page 134 and 135: Javascript document.write(""); docu
Page 136 and 137: Javascript document.write("num.toPr
Page 138 and 139: Javascript Returns the primitive va
Page 140 and 141: Javascript Returns the function tha
Page 142 and 143: Javascript Method toSource() toStri
Page 144 and 145: Javascript Output flag.toString
Page 146 and 147: 23. STRING Javascript The String ob
Page 148 and 149: Javascript Try the following exampl
Page 150 and 151: Javascript concat() indexOf() lastI
Page 152 and 153: Javascript document.writeln("str.ch
Page 154 and 155: Javascript Argument Details string2
Page 156 and 157: Javascript lastIndexOf () This meth
Page 158 and 159:
Javascript var index = str1.localeC
Page 160 and 161:
Javascript substring. $n or $nn Whe
Page 162 and 163:
Javascript Search () This method ex
Page 164 and 165:
Javascript document.write( sliced )
Page 166 and 167:
Javascript Try the following exampl
Page 168 and 169:
Javascript Return Value Returns a s
Page 170 and 171:
Javascript JavaScript String toLow
Page 172 and 173:
Javascript var str = "Apples are r
Page 174 and 175:
Javascript were in a tag sup() Cau
Page 176 and 177:
Javascript blink () This method cau
Page 178 and 179:
Page 180 and 181:
Javascript JavaScript String font
Page 182 and 183:
Javascript JavaScript String link(
Page 184 and 185:
Javascript JavaScript String strik
Page 186 and 187:
Javascript JavaScript String sup(
Page 188 and 189:
Javascript input length prototype T
Page 190 and 191:
Javascript Prototype The prototype
Page 192 and 193:
Javascript push() reduce() reduceRi
Page 194 and 195:
Javascript every () Javascript arra
Page 196 and 197:
Javascript } var passed = [12, 5, 8
Page 198 and 199:
Javascript Array.prototype.filter =
Page 200 and 201:
Javascript } }; Example Try the fol
Page 202 and 203:
Javascript var len = this.length; v
Page 204 and 205:
Javascript join () Javascript array
Page 206 and 207:
Javascript var from = Number(argume
Page 208 and 209:
Javascript } var index = [12, 5, 8,
Page 210 and 211:
Javascript Array.prototype.map = fu
Page 212 and 213:
Javascript Its syntax is as follows
Page 214 and 215:
Javascript var rv = arguments[1]; }
Page 216 and 217:
Javascript } } throw new TypeError(
Page 218 and 219:
Javascript } rv = this[i--]; break;
Page 220 and 221:
Javascript } rv = fun.call(null, rv
Page 222 and 223:
Javascript Output Removed element
Page 224 and 225:
Javascript { } if (i in this && fun
Page 226 and 227:
Javascript Return Value Returns a s
Page 228 and 229:
Javascript toString () Javascript a
Page 230 and 231:
25. DATE Javascript The Date object
Page 232 and 233:
Javascript Return Value Returns the
Page 234 and 235:
Javascript Date Methods Here is a l
Page 236 and 237:
Javascript universal time. setUTCMo
Page 238 and 239:
Javascript Syntax Its syntax is as
Page 240 and 241:
Javascript Example Try the followin
Page 242 and 243:
Javascript var dt = new Date(); d
Page 244 and 245:
Javascript getMonth() : 11 getSecon
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Javascript Output getUTCHours() :
Page 252 and 253:
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
Page 260 and 261:
Javascript monthValue : An integ
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 268 and 269:
Page 270 and 271:
Page 272 and 273:
Javascript var dt = new Date(1993,
Page 274 and 275:
Javascript toLocaleDateString () Ja
Page 276 and 277:
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
Page 286 and 287:
Javascript In the following section
Page 288 and 289:
Page 290 and 291:
Javascript Property Value is : 0.43
Page 292 and 293:
Javascript JavaScript Math SQRT2 P
Page 294 and 295:
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(+
Page 302 and 303:
Page 304 and 305:
Javascript Output First Test Value
Page 306 and 307:
Javascript var value = Math.log(10
Page 308 and 309:
Javascript min ( ) This method retu
Page 310 and 311:
Javascript var value = Math.pow(7,
Page 312 and 313:
Javascript Return Value Returns the
Page 314 and 315:
Javascript Output First Test Val
Page 316 and 317:
Page 318 and 319:
27. REGEXP Javascript A regular exp
Page 320 and 321:
Javascript Examples Following examp
Page 322 and 323:
Javascript m g Specifies that if th
Page 324 and 325:
Page 326 and 327:
Javascript Test1 - ignoreCase prope
Page 328 and 329:
Javascript if ( re.multiline ){ doc
Page 330 and 331:
Javascript exec ( ) The exec method
Page 332 and 333:
Javascript document.write("Test 2 -
Page 334 and 335:
Javascript document.write("Test 1 -
Page 336 and 337:
Javascript There are several DOMs i
Page 338 and 339:
Javascript forms[ ] 9 An array of F
Page 340 and 341:
Javascript Ex: document.close( ) op
Page 342 and 343:
Javascript This is main title Click
Page 344 and 345:
Javascript createElement( tagName)
Page 346 and 347:
Javascript NOTE: This example r
Page 348 and 349:
Javascript Specifies the loading st
Page 350 and 351:
Javascript NOTE: This example
Page 352 and 353:
Javascript Part 3: JavaScript Advan
Page 354 and 355:
Javascript Logical Errors Logic err
Page 356 and 357:
Javascript Now let us try to catch
Page 358 and 359:
Javascript Output Click the followi
Page 360 and 361:
Javascript Click the following to s
Page 362 and 363:
30. FORM VALIDATION Javascript Form
Page 364 and 365:
Javascript Basic Form Validation Fi
Page 366 and 367:
Javascript var emailID = document.m
Page 368 and 369:
Javascript Manual Animation So let'
Page 370 and 371:
Javascript } function moveRight(){
Page 372 and 373:
Javascript It is not possible to s
Page 374 and 375:
Javascript Output Checking for Plug
Page 376 and 377:
Javascript //--> If you
Page 378 and 379:
Javascript Error Messages in Firefo
Page 380 and 381:
Javascript Use a JavaScript Debugge
Page 382 and 383:
34. IMAGE MAP Javascript You can us
Page 384 and 385:
Javascript Output You can feel the
Page 386 and 387:
Javascript 6 plugins[] This propert
Page 388:
Javascript document.write(" Browser
show all

javascript_tutorial

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?