In HTML which tag is used to insert JavaScript ?

Answer 1

<script language = "JavaScript" src = "source" type="text/javascript">script</script>

Answer 2

If you are writing JavaScript code, use the language attribute as follows:
<script language="JavaScript">
// JavaScript code goes here
</script>

Usually, most JavaScript code is put into an external file, which is attached to HTML, like this:
<script src="/path/to/script.js"></script>

Answer 3

<script type="text/javascript" src="#">
/* JavaScript here
......
...... */
</script>