Học JavaScript qua ví dụ part 84 pps
Học JavaScript qua ví dụ part 84 pps
...
<head><title>The dot Metacharacter</title></head>
<body>
<script type="text /javascript& quot;>
1 var textString="Norma Jean";
2 var reg_expression = /N ma/;
3 ... WoweBook.Com
ptg
736 Chapter 17 • Regular Expressions and Pattern Matching
If you are searching for a particular character within a regular expression, you can use
the dot meta...
Học JavaScript qua ví dụ part 3 pps
... Chapter 1 • Introduction to JavaScript
So where is JavaScript now? As of December 2009, the ECMA-262 Standard is in its 5th
edition. JavaScript is a dialect of ECMAScript, but JavaScript 1.8 is comparable ... JScript 5.5, 5.6, 5.7, 6
JavaScript 1.6 2006 Mozilla Firefox, Safari
JavaScript 1.7 2006 Mozilla Firefox, Safari, Google Chrome
JavaScript 1.8 2008 Mozilla Firefox
JavaSc...
Học JavaScript qua ví dụ part 8 ppsx
... but JavaScript is loosely
typed. It doesn’t expect or allow you to specify the data type when declaring a variable.
You can assign a string to a variable and later assign a numeric value. JavaScript ... runtime, the JavaScript interpreter will convert the data to the correct type.
Consider the following variable, initialized to the floating-point value of 5.5. In each suc-
cessive st...
Học JavaScript qua ví dụ part 10 pps
...
</body>
</html>
EXPLANATION
1 The <script> tag starts the JavaScript program. The JavaScript engine starts exe-
cuting code from here until the closing </script> tag. JavaScript does not under-
stand HTML ... (right).
EXAMPLE 4.2
<html>
<head>
<title>Using JavaScript alert box</title>
1 <script type="text /javascript& quot;>...
Học JavaScript qua ví dụ part 19 pps
... value?
8. Did you define and call the function from within a JavaScript program?
Figure 7.17 shows function errors displayed by the JavaScript Error Console in
Firefox. This is a very useful ... button, rolling a
mouse over an image, or submitting a form. Functions will be defined within JavaScript
code or from another file. They may be used to create objects, respond to HTTP reques...
Học JavaScript qua ví dụ part 20 pps
... cup or a hat as an object. JavaScript can represent data
such as a string or a number as an object, and JavaScript lets you create your own
objects. When talking about JavaScript data types in ... Properties are not variables. Do not use
the var keyword.
4 This is the end of the JavaScript program.
5 A new JavaScript program starts here in the body of the page.
6 The global objec...
Học JavaScript qua ví dụ part 21 pps
...
</script>
</head>
<body>
<script type = "text /javascript& quot;>
7 var myBook = new Book(" ;JavaScript by Example",
"Ellie Quigley", "Prentice ... User-Defined Functions
8.2.1 What Is a Class?
JavaScript ain’t got no class! If you are familiar with Java or C++ you may be wondering
how to create a class in JavaScript. A class is a t...
Học JavaScript qua ví dụ part 25 ppsx
... WoweBook.Com
ptg
213
chapter
9
JavaScript
Core Objects
9.1 What Are Core Objects?
Like an apple, JavaScript has a core, and at its core are objects. Everything you do in
JavaScript will be based ... create your own as we did in Chapter 8,
“Objects,” or use JavaScript s core objects. Core objects are built right into the language.
JavaScript provides built-in objects that deal with...
Học JavaScript qua ví dụ part 28 pps
... characters enclosed in
either double or single quotes. The String object (starting with JavaScript 1.1) is a core
JavaScript object that allows you to treat strings as objects. The String object is ... up only if the decimal part of the
number is 5 or higher (see Figure 9.25).
Figure 9.25 Output from Example 9.21.
From the Library of WoweBook.Com
ptg
242 Chapter 9 • JavaScript Core...
Học JavaScript qua ví dụ part 32 pps
... href> tag is assigned
name of a JavaScript function. The JavaScript: label allows the function to be
called when the user clicks the link. Without the JavaScript: label, the browser will ... What It Describes
From the Library of WoweBook.Com
ptg
10.1 JavaScript and the Browser Object Model 291
Moving and Resizing a Window. JavaScript provides several methods with which
to resiz...
Từ khóa: