function getQueryParam(name) {

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

    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(window.location.href);

    if (results == null) 
        return "";
    else
        return results[1]; 
}