JavaScript

1 JavaScript Introduction
2 JavaScript Quiz Test
3 JavaScript Browser Objects Examples
4 JavaScript HTML DOM Events Examples
5 JavaScript HTML Objects Examples
6 JavaScript HTML Input Examples
7 JavaScript HTML DOM Examples
8 JavaScript Examples
9 JSONP
10 JSON HTML
11 JSON PHP
12 JSON.stringify()
13 JSON.parse()
14 JSON Arrays
15 JSON Objects
16 JSON Data Types
17 JSON vs XML
18 JSON Syntax
19 JSON - Introduction
20 AJAX Examples
21 XML Applications
22 AJAX Database Example
23 AJAX ASP Example
24 AJAX PHP Example
25 AJAX XML Example
26 AJAX - Server Response
27 AJAX - Send a Request To a Server
28 AJAX - The XML Http Request Object
29 AJAX Introduction
30 JavaScript Cookies
31 JavaScript Timing Events
32 JavaScript Popup Boxes
33 JavaScript Window Navigator
34 JavaScript Window History
35 JavaScript Window Location
36 JavaScript Window Screen
37 JavaScript Window - The Browser Object Model
38 JavaScript HTML DOM Node List
39 JavaScript HTML DOM Elements (Nodes)
40 JavaScript HTML DOM Navigation
41 JavaScript HTML DOM EventListener
42 JavaScript HTML DOM Events
43 JavaScript HTML DOM Animation
44 JavaScript HTML DOM - Changing CSS
45 JavaScript HTML DOM - Changing HTML
46 JavaScript HTML DOM Elements
47 JavaScript HTML DOM Document
48 JavaScript - HTML DOM Methods
49 JavaScript HTML DOM
50 JavaScript Closures
51 JavaScript Function Invocation
52 JavaScript Function Parameters
53 JavaScript Function Definitions
54 JavaScript Object Prototypes
55 JavaScript Object Methods
56 JavaScript Object Properties
57 JavaScript Objects
58 JavaScript Validation API
59 JavaScript Forms
60 JavaScript JSON
61 JavaScript Versions
62 JavaScript Reserved Words
63 JavaScript Performance
64 JavaScript Common Mistakes
65 JavaScript Best Practices
66 JavaScript Style Guide and Coding Conventions
67 JavaScript Use Strict
68 JavaScript Hoisting
69 JavaScript Debugging
70 JavaScript Errors - Throw and Try to Catch
71 JavaScript Regular Expressions
72 JavaScript Bitwise Operations
73 JavaScript Type Conversion
74 JavaScript Break and Continue
75 JavaScript While Loop
76 Java Script For Loop
78 JavaScript Switch Statement
79 JavaScript If...Else Statements
80 JavaScript Comparison and Logical Operators
81 JavaScript Booleans
82 JavaScript Sorting Arrays
83 JavaScript Array Methods
84 JavaScript Arrays
85 JavaScript Date Methods
86 JavaScript Date Formats
87 JavaScript Dates
88 JavaScript Random
89 JavaScript Math Object
90 JavaScript Number Methods
91 JavaScript Numbers
92 JavaScript String Methods
93 JavaScript Strings
94 JavaScript Events
95 JavaScript Scope
96 JavaScript Objects
97 JavaScript Functions
98 JavaScript Data Types
99 JavaScript Assignment
100 JavaScript Arithmetic
101 JavaScript Operators
102 JavaScript Variables
103 JavaScript Comments
104 JavaScript Statements
105 JavaScript Syntax
106 JavaScript Output
107 JavaScript Where To

JavaScript Quiz Test

JavaScript Quiz Test

You can test your JavaScript skills with Omegas' Quiz.

The Test

The test contains 25 questions and there is no time limit.

The test is not official, it's just a nice way to see how much you know, or don't know, about JavaScript.

Count Your Score

You will get 1 point for each correct answer. At the end of the Quiz, your total score will be displayed. Maximum score is 25 points.

Start the Quiz

Good luck!

Start the Quiz

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JavaScript Browser Objects Examples

JavaScript Browser Objects Examples

Examples of using JavaScript to access and manipulate the Browser objects.

Window Object

Open a new window when clicking on a button

Open a new window and control its appearance

Blur and Focus a new window

Close the new window

Checks whether the new window has been closed or not

Write some text to the source (parent) window

Move the new window relative to its current position

Move the new window to the specified position

Print the current page

Resize a window by the specified pixels

Resize a window to a specified size

Scroll the content by the specified number of pixels

Scroll the content to a specified position

Window explained

Screen Object

The visitor's screen: Width

The visitor's screen: Height

The visitor's screen: Available Width

The visitor's screen: Available Height

The visitor's screen: Color Depth

The visitor's screen: Pixel Depth

Screen explained

Location Object

Return the hostname and port of the current URL

Return the entire URL of the current page

Return the path name of the current URL

Return the protocol portion of the current URL

Load a new document

Replace the current document

Break out of a frame

Location explained

History Object

Display the number of URLs in the history list

Create a back button on a page

Create a forward button on a page

Load a specific URL from the history list

History explained

Navigator Object

Is cookies enabled in the visitor's browser?

What is the name of the visitor's browser?

What is the engine name of the visitor's browser?

What is the version information of the visitor's browser?

What is user agent information of the visitor's browser?

What is the platform of the visitor's browser?

What is the language of the visitor's browser?

Is Java enabled in the visitor's browser?

Navigator explained

Popup Boxes

Display an alert box

Demonstrate line breaks in an alert box

Display a confirm box

Display a prompt box

Popup explained

Timing

Simple timing

Another simple timing

Timing event in an infinite loop

Timing event in an infinite loop - with a Stop button

A clock created with a timing event

Set and stop a timer with setInterval() and clearInterval()

Timing explained

Cookies

Create a welcome cookie

Cookies explained

JavaScript HTML DOM Events Examples

JavaScript HTML DOM Events Examples

Examples of using JavaScript to react to events

Input Events

onblur - When a user leaves an input field

onchange - When a user changes the content of an input field

onchange - When a user selects a dropdown value

onfocus - When an input field gets focus

onselect - When input text is selected

onsubmit - When a user clicks the submit button

onreset - When a user clicks the reset button

onkeydown - When a user is pressing/holding down a key

onkeypress - When a user is pressing/holding down a key

onkeyup - When the user releases a key

onkeyup - When the user releases a key

onkeydown vs onkeyup - Both

Mouse Events

onmouseover/onmouseout - When the mouse passes over an element

onmousedown/onmouseup - When pressing/releasing a mouse button

onmousedown - When mouse is clicked: Alert which element

onmousedown - When mouse is clicked: Alert which button

onmousemove/onmouseout - When moving the mouse pointer over/out of an image

onmouseover/onmouseout - When moving the mouse over/out of an image

onmouseover an image map

Click Events

Acting to the onclick event

onclick - When button is clicked

ondblclick - When a text is double-clicked

Load Events

onload - When the page has been loaded

onload - When an image has been loaded

onerror - When an error occurs when loading an image

onunload - When the browser closes the document

onresize - When the browser window is resized

Others

What is the keycode of the key pressed?

What are the coordinates of the cursor?

What are the coordinates of the cursor, relative to the screen?

Was the shift key pressed?

Which event type occurred?

Examples explained

JavaScript HTML Objects Examples

JavaScript HTML Objects Examples

Examples of using JavaScript to access and manipulate HTML objects.

Anchor Object

Find the value of the href attribute of a link

Find the value of the hreflang attribute of a link

Find the value of the id attribute a link

Find the value of the rel attribute of a link

Find the value of the target attribute of a link

Find the value of the type attribute of a link

Area Object

Find the alternate text of an image-map area

Find the coordinates of an area

Find the shape of an area

Find the href of an area

Find the protocol part of the href attribute of an area

Find the hostname part of the href attribute of an area

Find the port number part of the href attribute of an area

Find the pathname part of the href attribute of an area

Find the querystring part of the href attribute of an area

Find the hash part of the href attribute of an area

Find the value of the target attribute of an area

Base Object

Find the base URL for all relative URLs on a page

Find the base target for all links on a page

IFrame Object

Change the background color of an iframe

Find the height of an iframe

Find the value of the name attribute of an iframe

Find the source (src) attribute of an iframe

Change the source (src) attribute of an iframe

Image Object

Find the alternate text of an image

Find the height of an image

Click to display a high-resolution version of an image

Find the source (src) of an image

Change the source of an image

Change the source of the lightbulb

Find the value of the usemap attribute of an image

Table Objects

Change the width of a table border

Change the padding of a table

Find the innerHTML of a cell

Create a caption for a table

Delete rows in a table

Add rows to a table

Change the content of a table cell