Get the URL query string parameters in JavaScript.

qstring.js

        var queryString = {};
        location.search.substr(1).split("&").forEach(function (pair) {
            if (pair.length) {
                var parts = pair.split("=");
                queryString[parts[0]] = decodeURIComponent(parts[1].replace(/\+/g, " "));
            }
        });

        console.log(queryString);