GetParam(name)

 function GetParam(name) {
            var match = new RegExp(name +
                "=*([^&]+)*", "i").exec(location.search);
            if (match == null)
                match = new RegExp(name + "=(.+)", "i").exec(location.search);
            if (match == null) return null;
                match = match + "";
            //**convert match to a string
            result = match.split(",");
            return decodeURIComponent(result[1]);
        }