Recent versions of Apache, Nginx and Let's Encrypt redirect to https automatically making this script unnecessary. If Apache / Nginx is not redirecting to https try this script.
This is code to redirect web page traffic from http to https ( secure web )
To reference this javascript file use the following in the head of your webpages
<script src="./redirectToHttps.js"></script>
Then place the redirectToHttps.js file in the same directory as the file(s) with the script tag or adjust the src location.