How to access xAPI/Tin Can LMS variables in JavaScript

Here is Retrieve the username From storyline code.

function getParameterByName(name, url) {

if (!url) url = window.location.href;

name = name.replace(/[\[\]]/g, "\\$&");

var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),

results = regex.exec(url);

if (!results) return null;

if (!results[2]) return '';

return decodeURIComponent(results[2].replace(/\+/g, " "));

}

var a =[];var a1 = [];

var foo = getParameterByName('actor');

a = foo.split(",");

var x=a[0];

a1 = x.split(":");

var str = a1[1];

var UName = str.replace(/[^a-zA-Z ]/g, "");

var player = GetPlayer();

player.SetVar("UserName",UName);