Using the Scripting Elements

script element defines scripts and control their execution. noscript defines what happens when a browser doesn't support scripting.

The script element is usually inside the head element, but you may use it anywhere in an HTML document.

Local Attributes of the script Element:

Attribute	Description
type	the type of the script. This attribute can be omitted for JavaScript scripts.
src	the URL for an external script file.
defer / async	how the script will be executed.
charset	the character encoding of an external script file.

Defining an Inline Script

inline means that you include the JavaScript statements in the HTML page.

 
<!DOCTYPE HTML>
<html>
<head>
<title>Example</title>
<script>
      document.write("This is from the script");
</script>
</head>
<body>
      <a href="http://java2s.com">Visit java2s.com</a>
</body>
</html>

If you don't use the type attribute, the browser will assume that you are using JavaScript.

By default, scripts are executed as soon as they are encountered in the page.