Call ajax from any platform using jquery library

script.js

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>
  function functionName(){
      $.ajax({
                type: "POST",
                url: "URL", 
                data: '{parameterName: "' + parameterValue + '"',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (response) {
                   //success return
                },
                failure: function (response) {
                   //error return
                }
            });
       }
</script>