Học JavaScript qua ví dụ part 2 ppt
Học JavaScript qua ví dụ part 2 ppt
... recommended in late 1998. DOM Level 2 was published in late 20 00. The cur-
rent release of the DOM specification was published in April 20 04. By 20 05, large parts
of W3C DOM were well supported ... ECMA -25 2 edition 5, see http://www.ecmas-
cript.org/.
1.9.1 JavaScript Objects
Everything you do in JavaScript involves objects, just as everything you do in real life
involves obje...
Học JavaScript qua ví dụ part 6 pptx
... shown in
Example 2. 4 and Figures 2. 9, 2. 10, and 2. 11.
FORMAT
JavaScript: expression
EXAMPLE 2. 4
JavaScript: 5 + 4
Figure 2. 9 Internet Explorer and the JavaScript: protocol.
Figure 2. 10 Mozilla Firefox ... <script type="text /javascript& quot;>
2 <! Hiding JavaScript from Older Browsers
3 document.write("<h2>Welcome to Maine!</h2>");
4...
Học JavaScript qua ví dụ part 7 ppt
... sequences are a mechanism for quoting a single character.
EXAMPLE 3.1
123 45 integer
23 .45 float
.23 4E -2 scientific notation
.23 4e+3 scientific notation
0x456fff hexadecimal
0x456FFF hexadecimal
0777 ... numbers such as 123 .56 or 2. 5. They must
contain a decimal point or an exponent specifier, such as 1.3e 2. The letter “e” for expo-
nent notation can be either uppercase or lo...
Học JavaScript qua ví dụ part 9 pptx
... a variable. JavaScript declares
constants with the const type (which replaces var) and the name of the constant is in
</body>
</html>
Output:
3 25 cats
4 almost 25
5 29
6 510 years
7 ...
<head><title>Using the const Keyword</title>
<script type="text /javascript& quot;>
1 const NOON = 12;
2 const FREEZING = 32; // Can't change
</sc...
Học JavaScript qua ví dụ part 16 pptx
... argument2, ); // function call (caller)
function_name(parameter1, parameter2 ){ // function definition (receiver)
var result= parameter1 + parameter2;
} // curly braces required
Figure 7 .2 After ... anywhere. Function definitions are often
stored in external JavaScript files or libraries (see JavaScript from External Files” on
page 22 of Chapter 1).
To define a function, the functi...
Học JavaScript qua ví dụ part 18 pptx
... previous numbers
together; so 0 + 1 is 1, 1 + 1 is 2, 1 + 2 is 3, 2 + 3 is 5, and so on.
In Example 7.10, the Fibonacci sequence recurses 20 times and as you can see, if
these numbers represent ... type="text /javascript& quot;>
1 var count = 0;
2 function fib(num){
3 count++;
switch(num){
case 0 :
4 return(0);
break;
case 1:
5 return(1);
break;
default:
6 return(fib(nu...
Học JavaScript qua ví dụ part 29 ppt
... ptg
25 6 Chapter 9 • JavaScript Core Objects
EXAMPLE 9 .28
<html>
<head><title>String Manipulation</title></head>
<body>
<h2>Working with ... Substr method returns 5 characters.
Figure 9.33 Output from Example 9 .28 .
From the Library of WoweBook.Com
ptg
25 2 Chapter 9 • JavaScript Core Objects
String.bold() <b>String</b>
String...
Học JavaScript qua ví dụ part 31 ppt
... Internet Explorer and Firefox >
<h2>Flash swf file As Object</h2>
1 <object
width=" ;25 0" height="100"
2 classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" ... .wav, .pdf, and so on. Partial output is shown in Figure 10.15.
Figure 10.15 MIME types: Output from Example 10.6 (partial list).
From the Library of WoweBook.Com
ptg
28 2 Chapter...
Học JavaScript qua ví dụ part 34 ppt
... 310.)
FORMAT
JavaScript: window.location.href = "URL";
JavaScript: window.location.replace("URL");
EXAMPLE
JavaScript: window.location.href = "http://www.legos.com/";
JavaScript: ... display is
shown in Figure 10 .28 on page 311.
EXAMPLE 10.17 (CONTINUED)
From the Library of WoweBook.Com
ptg
10.1 JavaScript and the Browser Object Model 311
JavaScript co...
Học JavaScript qua ví dụ part 43 ppt
... text in a textbox with JavaScript.
19. What the blur() and focus() methods do.
20 . How to use multiple selects.
21 . How the selectedIndex property works with drop-down menus.
22 . How to test for ... Input Devices
EXAMPLE 11 .29
<html>
<head><title>Verifying a Password</title>
<script type="text /javascript& quot;>
1 function valid(form){
2 if( f...