function getUrlParam(name, url) {
    var url = url || window.location.href;
    var queryString = url.substr(url.indexOf('?') + 1);
    var params = queryString.split('&');
    for(i in params) {
        var paramParts = params[i].split('=');
        if(paramParts[0] == name) {
            return paramParts[1];
        }
    }
    return undefined;
}