writing js in html {} code example
Example 1: js script
<script src="javascript.js"></script>
Example 2: how to enter javascript in html
<script type="text/javascript">
alert("This alert box was called with the onload event");
</script>
<script src="javascript.js"></script>
<script type="text/javascript">
alert("This alert box was called with the onload event");
</script>