Placing Code
When you want to place the script somewhere in the HTML document, you need to choose where to put it. Technically, you may place it anywhere between the <HTML> and </HTML> tags that enclose the whole document. Actually, the two possibilityes are the <HEAD></HEAD> portion and the <BODY></BODY> portion. Because the <HEAD></HEAD> portion is evaluated first, some developers choose to place their JavaScript here. A single HTML document may contain any number of scripts. You can place some of the scripts in the <HEAD></HEAD> portion and others in the <BODY></BODY> portion of the page.
The following code demonstrates this:
Scripts in the Head.
<html>
<head>
<title> Javascript Document</title>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</head>
<body>
</body>
</html>
<head>
<title> Javascript Document</title>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</head>
<body>
</body>
</html>
A Script in the Body
<html>
<head>
<title> Javascript Document</title>
</head>
<body>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</body>
</html>
<head>
<title> Javascript Document</title>
</head>
<body>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</body>
</html>
Scripts in the Head and Body
<html>
<head>
<title>Javascript Document</title>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</head>
<body>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</body>
</html>
<head>
<title>Javascript Document</title>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</head>
<body>
<script type=”text/javascript”>
//script statement(s) here
...
</script>
</body>
</html>
Placing JavaScript code in another file
<html>
<head>
<title> Javascript Document</title>
</head>
<script type=”text/javascript” src=”scripts/javafile.js”></script>
<body>
</body>
</html>
<head>
<title> Javascript Document</title>
</head>
<script type=”text/javascript” src=”scripts/javafile.js”></script>
<body>
</body>
</html>
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