Học JavaScript qua ví dụ part 3 pps
Học JavaScript qua ví dụ part 3 pps
... the getElementById and createTextNode are part of the W3C standard, which sup-
ports the DOM.
1.10 .3 Is JavaScript Enabled on Your Browser?
To see if JavaScript is enabled on your browser, you ... of WoweBook.Com
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1.10 What Browser? 17
JavaScript 1 .3 1998 ECMA- 232 , Netscape Navigator 4.06–4.7x, Internet Explorer 5.0
JavaScript 1.5 2000 ECMA- 232 , Netscape Navigator 6.0+,...
Học JavaScript qua ví dụ part 8 ppsx
... here.
Continues
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3. 2 Variables 63
Figure 3. 5 Internet Explorer error (Example 3. 5).
Table 3. 3 How JavaScript Converts Data Types
Variable Assignment Conversion
var ... displayed. Figure 3. 6 shows the output in Internet
Explorer.
Figure 3. 6 Declaring and displaying variables.
EXPLANATION
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3. 3 Constant...
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 ...
<head>
<title>Using JavaScript alert box</title>
1 <script type="text /javascript& quot;>
2 var message1="Match your...
Học JavaScript qua ví dụ part 19 pps
... testing of the age variable (see
Figure 7.22).
EXAMPLE 7. 13 (CONTINUED)
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7 .3 What You Should Know 1 73
1. Copy the following file and execute it in your browser. ... you should know:
1. How to declare and define functions.
2. Where to put functions in a JavaScript program.
3. How to call a function with arguments and use parameters.
4. What can be...
Học JavaScript qua ví dụ part 20 pps
... 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 Chapter 3, “The ... properties of the toy object are displayed.
8 This is the end of the JavaScript program. The output is shown in Figure 8 .3.
Figure 8 .3 The toy object and its properties.
EXAMPLE 8.2 (CON...
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 ...
<head><title>functions</title>
<script type="text /javascript& quot;>
1 function Distance(r, t){//Constructor function
2 this.rate = r;
this.time = t;
3 thi...
Học JavaScript qua ví dụ part 25 ppsx
... Array("Math","English", "PE");
4 student["Phones"]=new Array("415 -33 3-1 234 "," 530 -34 5-5 432 ");
5 document.write("The student's name is " + student["Name"] ... apple, JavaScript has a core, and at its core are objects. Everything you do in
JavaScript will be based on objects; you may create your own...
Học JavaScript qua ví dụ part 28 pps
... WoweBook.Com
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242 Chapter 9 • JavaScript Core Objects
Math.LOG2E 1.4426950408889 633 87 Log base-2 of E
Math.Log10E 0. 434 2944819 032 518167 Log base-10 of E
Math.PI 3. 145926 535 897 931 16 Pi, ratio of the ... methods.
Table 9.7 Rounding up and down
Number ceil() floor() round()
2.55 3 2 3
2 .30 3 2 2
–2.5 –2 3 –2
–2 .3 –2 3 –2
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...
cir...
Học JavaScript qua ví dụ part 32 pps
... BOM! Browser Objects
<h3>Click here to see through my winter window<br />
3 <a href=" ;JavaScript: newWindow()">Winter Scene</a></h3>
</body>
</html>
EXPLANATION
1 ... window is often partitioned into independent display
areas, called frames, which are windows within windows. (Frames are discussed in the
section “Working with Frames” on...
Học JavaScript qua ví dụ part 39 pps
... the Library of WoweBook.Com
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11.4 JavaScript and the form Object 35 3
The elements and properties of the HTML <form> tag are shown in Table 11.8.
How JavaScript References the Form Elements ... name.
Figure 11. 13 Name those forms!
EXPLANATION
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35 0 Chapter 11 • Working with Forms and Input Devices
11.4 .3 Naming Forms and Buttons
How Jav...