Simply create a web page and include the code. Save the file locally and double click it to open in your browser. If your script relies on certain elements being on the page then you'll have to add them.
Code:
<!DOCTYPE html>
<html>
<head>
<!-- put CSS links and meta tags here -->
</head>
<body>
<!-- Any elements you need for your script to work -->
<script src = "path to your script"></script>
</body>
</html>
Depending on how you've written your script you may have to add an event handler to the body:
Code:
<body onload="entryfunction()">
Better is to use the IIFE (Immediately Invoked Function Expression) format at the foot of the page:
Code:
<script>
(function (){
// All your code here or call your entry function.
}());
</script>
Thanks I shared it with Dunmail and his response was:
look at that code looks like it is a subsystem that gets called from something else. It relies on jquery so you'd need that. Not sure what else it might need.
Either ask whoever you got the script from or create a web page with buttons that when clicked call the functions in the code.