JavaScript Overview by Floyd Jay Winters, State College of Florida
Javascript Overview |  Javascript Operators |  Javascript Commands 
DHTML (Dynamic HTML) uses CSS and JavaScript to modify page elements on the fly to create interactive and animated web sites.
Cascading Style Sheets use a stylesheet language to quickly modify styles, formatting and presentation for an entire Web site, while easily bringing a consistent look and feel to a customized site.
JavaScript is a client-side scripting language and has a similar look to Java programming and CSS.

JavaScript can:
  1. Allow Interactivity
  2. Display Pop-up messages to users
  3. Perform Calculations
  4. Perform Validation
  5. Work with Event Handlers such as onload or onclick
  6. Produce and preload Roll-over images
  7. Work with Cookies
Notes:
JavaScript is Case sensitive. Almost all commands are in lower case.
Internal JavaScript commands are placed inside <script> tags.
External JavaScript files have a .js extension.
External scripts are often loaded in the <head> tags.
For example: <script src="scriptName.js" type="text/javascript"></script>
Javascript Overview |  Javascript Operators |  Javascript Commands 
Last Update: July 5, 2025