1. JavaScript What is JavaScript? What can JavaScript do?
Three ways to invoke JavaScript
Important JavaScript Facts
Data types and values
Creating Variable
Syntax for JavaScript Statements
JavaScript Examples

2. What is JavaScript? JavaScript is a simplest programming language
JavaScript is not Java
Syntax similar but variable has no data type.
JavaScript controls browsers behavior
Cannot draw Graphics, & do multithreading

3. What can JavaScript do? JavaScript can interact by…
Putting dynamic text into HTML page
Reacting to Events
Validate data

4. Three ways to invoke JavaScript
Inline code found between <script> and </script> tag. Inline code is invoked or executed when the browser gets up to the line of code
From the Event Handler. In response to a specific things that the user does
As a timed event, you can set up a timer that goes off regularly at a predetermined interval and each time a specific code gets executed.

5. Important JavaScript Facts
Java is case sensitive
Inside a double quote, you must use a single quote
JavaScript has whitespace; it ignores extra spaces
Every statement must end with a semicolon

6. Data Types and Values Numbers-integer, hexadecimal, floating point
Strings- number or letters enclosed between quotation
Escape sequence (\n, \t, \”)
Boolean Values is either true or false

7. Data Types and Values
Function is block of statement which is defined once and can be executed many times
Function can have passed argument or parameter
Functions can return value or not return value
Array object is used to store a list of values

8. Creating Variable
Variable is a name associated with the data value or text; it stores the data.
Assignment Statement
var variablename = ;
Semantics (meaning)
Evaluate the expression
Copy the result into the variable on the left-hand side of the equal sign
value/text/Expression

9. Syntax for JavaScript Statements
objectname.properties = “ ”;
Examples:
Assign background color for the page
document.bgColor = “ ”;
Assign information on the status bar
window.status = “ ”;
Assign a page to load in the window
window.location = “ ”;

10. Syntax for JavaScript Statements
variablename = objectname.properties;
Examples:
Get background color for the page
var backgroundC = document.bgColor;
Get information on the status bar
var current status = window.status;
Get current page address
var page = window.location;

11. Syntax for JavaScript Statements
objectname.methodname();
variablename=objectname.methodname();
Examples:
window.alert();
document.write()
var data = window.prompt();