JavaScript

JAVASCRIPT

There are 6 basic of JavaScript

• For Loop
• While Loop
• Do While Loop
• User-defined Function
• Working with Web Pages Properties
• Error Checking

For Loop

• Execute the same block of code according specified times.
  

• Another example of Loop

While Loop

• Execute the same block of code while a specific condition is true
  

• Another example While Loop

Do While Loop

• Execute the block of code at least once even the condition is false. because the code will be executed first before condition is tested. It will repeat the loop as long as the specified condition is true.
  

User-defined Function

Working with Web Page Properties

• May be you are not realized that you have used Web Pages properties (or Document properties) a few times.
• Example :

*document.write ( ) : to display information on the web page

• We have others like :

*document.bgColor : Example | Source Code

*document.fgColor : Example | Source Code

*document.lastModified : Example | Source Code

Error Checking

• Remember this example?