var getUrlParameter = function getUrlParameter(sParam) {
            var sPageURL = window.location.search.substring(1),
                sURLVariables = sPageURL.split('&'),
                sParameterName,
                i;

            for (i = 0; i < sURLVariables.length; i++) {
                sParameterName = sURLVariables[i].split('=');

                if (sParameterName[0] === sParam) {
                    return sParameterName[1] === undefined ? true : decodeURIComponent(sParameterName[1]);
       