Học JavaScript qua ví dụ part 15 pot
Học JavaScript qua ví dụ part 15 pot
...
<head>
<title>Nested loops</title>
</head>
<body>
<script type="text /javascript& quot;>
<! Hiding JavaScript from old browsers
1 var str = "@";
2 for ( var row = 0; ... switch statement to rewrite the following JavaScript code. Prompt the user
for the number of a month rather than setting it to 8.
<script type=text /javascrip...
Học JavaScript qua ví dụ part 1 potx
... interpreted by a JavaScript engine that lives in the browser.
JavaScript is not HTML, but JavaScript code can be embedded in an HTML docu-
ment and is contained within HTML tags. JavaScript has ... until a JavaScript
opening tag is read, at which time the JavaScript interpreter takes over. When the closing
JavaScript tag is reached, the HTML processing continues.
1. But the cr...
Học JavaScript qua ví dụ part 23 potx
... to all Book objects.
5 When JavaScript tries to retrieve the value of the category property, the property
was not directly assigned in the constructor function. JavaScript checks to see if a ... 8.2 explained that unlike Java and C++, JavaScript doesn’t have a class mech-
anism per se, but inheritance involves reusing or extending a class. With JavaScript we
can simulate a class wit...
Học JavaScript qua ví dụ part 24 pot
... instanceof String;
if( result == true ){ }
EXAMPLE 8 .15
<html>
<head><title>Object object</title>
<script type="text /javascript& quot;>
1 function Book(title, author){
this.title ...
object type; that is, tale is also an Object type. The output is shown in Figure 8.18.
EXAMPLE 8 .15 (CONTINUED)
From the Library of WoweBook.Com
ptg
204 Chapter 8 • Ob...
Học JavaScript qua ví dụ part 27 potx
... Date()
mydate = new Date("March 15, 2010 09:25:00")
mydate = new Date(“March 15, 2010”)
mydate = new Date(10,2 ,15)
mydate = new Date(10,2 ,15, 9,25,0)
mydate = new Date(500);
From ... Date</title></head>
<body bgcolor="aqua"><h2>Date and Time</h2>
<big>
<script type="text /javascript& quot;>
1 var now = new Date();...
Học JavaScript qua ví dụ part 33 potx
... intervaltime);
EXAMPLE
var timeout = setTimeout("timer()", 150 00); // In 15 seconds call the
// function "timer()"
var timeout = setTimeout(timer ,150 00); //Use function reference
var timerId = ... (1,000 * 60 * 60 * 24 * 7)
3. For an example of a timer to create animation, see Chapter 15, “The W3C DOM and JavaScript. ”
From the Library of WoweBook.Com
ptg
292 Chap...
Học JavaScript qua ví dụ part 36 potx
... WoweBook.Com
ptg
11.2 The JavaScript Hierarchy 331
Using the document Object Properties in JavaScript. Example 11.2 demon-
strates how the properties that describe the document are used in a JavaScript program. ... ptg
11.2 The JavaScript Hierarchy 329
the window, because JavaScript knows that the window is at the top of the tree. Instead of
saying ... by numeric index value (numeri...
Học JavaScript qua ví dụ part 37 pot
... Library of WoweBook.Com
ptg
11.4 JavaScript and the form Object 341
11.4 JavaScript and the form Object
In the previous example, the HTML form had nothing to do with JavaScript. After a form
has ... the form information to the server,
JavaScript can check to see if the form was filled out properly; for example, every input
field can be validated by JavaScript. It can check for empty...
Học JavaScript qua ví dụ part 42 pot
... the list. Tables 11 .15 and 11.16 list the properties and methods of the
select object. Figure 11.35 shows the JavaScript object hierarchy for the select object.
Table 11 .15 Properties of the ... select box.
handleEvent() Invokes the handler for a specified event (JavaScript 1.2).
unwatch() Turns off the watch for a particular property.
watch() Watches, and when a property is changed,...
Học JavaScript qua ví dụ part 44 pot
... Properties of the JavaScript links Object
Property What It Describes
hash The anchor part of the URL (if any).
host The hostname port part of the URL.
hostname The hostname part of the URL.
href ... (hotspot) and the link
that will be associated with that part of the image. The most time-consuming and boring
part of this process is determining the coordinate positions for the hot...
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