function getURLParameter(param) {
    param = param.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
    var regexS = "[\\?&]"+param+"=([^&#]*)";
    var regex = new RegExp( regexS );
    var results = regex.exec( window.location.href );
    if( results == null ) {
        return "";
    } else {
        // Get the value
        var data = results[1];

        // return unescaped value
        return unescape(data);
    }
}