DIY Canadian: How-To Guides for Canadians 
What is JavaScript?
JavaScript is the world's most popular computer programming language.
What does JavaScript do?
JavaScript is used to create interactive effects in web browsers. JavaScript can:
- Read and write to HTML elements
- React to a user's events. For example,
- Check compatability of web browser with a web page
- Store cookies to a vistor's browser (cookies are a temporary piece of information that your browser will remember)
What does JavaScript look like?
JavaScript is written in scripting language. JavaScript is incorporated into a web page by adding a script tag, <script>, and an end script tag, </script>, in the header or body of an HTML document. However, since JavaScript programming code can be hundreds of lines long, it is often written in a '.js' file and then linked to the html document.
How do I use JavaScript?
Step 1: Insert <script> and </script> tags into the <head> or <body> section of HTML page. The script tag will indicate where the JavaScript starts and ends.
Step 2: Begin programming JavaScript within the script tags! There are many things that JavaScript can do and each task will require a different script.
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