how to link js file in html header code example
Example 1: how to reference a javascript file in html
<script type="text/javascript" src="path/filename.js"></script>
Example 2: calling javascript file in html
<script type="text/javascript" src="yourfile.js"></script>
Example 3: how to connect a javascript file to html
<script src="name.js">
//put in your javascript here
</script>