Login 
Password
  
 


JavaScript Cert. Exam
Test your skills with our JavaScript certification exam and see how you stack up right now.

Homepage
Visit our homepage and find out more about what NCSA can do for you.

Introduction to JavaScript
Using JavaScript on your Webpage
A Simple JavaScript Application
Variables & Operators
Variables
Operators
Loops & Conditionals
Loops
Conditionals
Document Object Model
Nodes
Functions & Methods
Built-in Functions
User Defined Functions
Forms & Events
Forms
Events
Browsers
Cookies
Image Maps
Timing Events

Learn More About Us
Find out more about how our certifications can benefit you.

Course Descriptions
View a complete listing of certifications available through NCSA.

Employer Programs
Visit our employer programs page and discover the options available to connect you with our customers.

Certificate Database
Lookup a certification in our online database.

Affiliate Program
Make money by helping people get the computer training and certification they need. Sign-up Here!

Support Center
If you have questions or concerns feel free to visit our online support center.


 

Loops


Conditional statements use conditional operators on variables to make decisions in code. The standard conditional statements are:

 

·        if statement - This statement allows you to execute a piece of code only if a specified condition is true.

Syntax:

if (expression)

    { Statement;}

 

Example:

<html>

<body>

<script type="text/javascript">

var a = 10;

var b= 10;

if ( a==b)

{

document.write("The values of a and b are equal!");

}

</script>

</body>

</html>

 

 

·        if...else statement - This statement allows you to select which of the two pieces of code to execute depending on the condition. If the condition is true then the first piece of code is executes else another piece of code is executed.

 

Syntax:

if (expression)

    { Statement;}

else

{ Statement;}

 

Example:

<html>

<body>

<script type="text/javascript">

var a = 10;

var b= 12;

 

if ( a==b)

{

document.write("The values of a and b are equal!");

}

else

{

document.write("The values of a and b are not equal!");

}

</script>

</body>

</html>

 

·        if...else if....else statement - This statement allows to select one of the many blocks of code to be executed.

 

Syntax:

if (expression)

    { Statement;}

else if (expression)

    { Statement;}

else

{ Statement;}

 

Example:

<html>

<body>

<script type="text/javascript">

 

var age = 18;

var b=15;

 

if (b >= age)

{

document.write("You are eligible to vote!");

}

else if (b < age)

{

document.write("You are not eligible to vote!");

}

else

{

document.write("Please enter your age!");

}

</script>

</body>

</html>

 

·        Switch… case - This statement also allows you to select one of the many blocks of code to be executed. This is quite similar to if...else if....else statement but it is more useful when all the values of a variable needs to be checked.

 

Syntax:

switch (expression)

{

Case label :

    { Statement1;

     Break;

Case label 2:

    { Statement2;

     Break;

Default:

Statement3;

}

Example:

<html>

<body>

<script type="text/javascript">

 

var dateobj=new Date();

var today=dateobj.getDay();

 

switch(today)

{

case (1):

document.write("Today is Monday!");

break;

case (2):

document.write("Today is Tuesday!");

break;

default:

document.write("Today it is neither Monday nor Tuesday");

}

</script>

</body>

</html>

 


NCSA OnDemand Training Courses



Web-based Training Courses, including 7,500+ Videos & Articles, covering:

Microsoft Office
2003 | 2007
Microsoft Windows
Vista
Visio
2003 / 2007
OneNote
2003 / 2007
Project
2003 | 2007
Sharepoint
3.0
Access
2003 | 2007
Excel
2003 | 2007
Outlook
2003 | 2007
PowerPoint
2003 | 2007
Word
2003 | 2007
Office for Mac
2008
Excel for Mac
2008
Entourage for Mac
2008
PowerPoint for Mac
2008
Word for Mac
2008

Acrobat 8 Professional ADO.NET 2.0 ASP.NET 2.0 for Visual Basic 2005
C# 2005 Crystal Reports XI Exchange Server 2003
Flash 8 ActionScripting Flash 8 for Designer FrontPage 2003
Mind Manager 7 Pro + Project 2007 Mind Manager 7 Pro Fundamentals Office 2007 - What's New
Photoshop CS2 PHP Programming QuickBooks Pro 2006
SharePoint End User: Administrator SharePoint End User: Contributor SharePoint End User: Reader
Small Business Server 2003 SQL Server 2005 Visual Basic 2005
Windows Server 2003

Order NCSA OnDemand today and get access to over 7500 quality instuctor led videos and training courses covering today's most popular software programs and programming languages.

OnDemand Monthly - $25/month
No long term commitment.
Annual Member - $159/year
Save 50%off monthly price.
Premium - $249/year
Includes NCSA certifications


    

  
HOME    PRIVACY    EMPLOYERS    CERTIFICATION LIST    AFFILIATES    CONTACT US

© 2002-2010 National Computer Science Academy, All Rights Reserved.