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09 JavaScript

• STEP 1: What is JavaScript?
  JavaScript is used in millions of Web pages to improve the design, validate forms, detect browsers, create cookies, and much more.
  JavaScript is the most popular scripting language on the internet, and works in all major browsers, such as Internet Explorer, Mozilla, Firefox, Netscape, Opera.
  
  STEP 2: JavaScript How To ...
  The HTML <script> tag is used to insert a JavaScript into an HTML page.
  
  STEP 3: JavaScript Where To ...
  JavaScripts in the body section will be executed WHILE the page loads.
  JavaScripts in the head section will be executed when CALLED.
  
  STEP 4: JavaScript Variables
  A variable is a "container" for information you want to store. A variable's value can change during the script. You can refer to a variable by name to see its value or to change its value.
  
  STEP 5: JS Syntax
  JS If...Else
  JS Switch
  JS Operators
  JS Popup Boxes
  JS Functions
  JS For Loop
  JS While Loop
  JS Break Loops
  JS For...In
  JS Events
  JS Try...Catch
  JS Throw
  JS onerror