adding script in html code example

Example 1: include script in html

<script type="text/javascript" src="/path/to/script.js"></script>

Example 2: how to put javascript in HTML

<script>
  //put your java script here
  </script>

Example 3: how to enter javascript in html

<script type="text/javascript">
  alert("This alert box was called with the onload event");
</script>