Javascript GetQueryString - Rob Hardy

function GetQueryString(KeyName) {
    if (document.location.search && document.location.search.length > 1) {
        var Queries = document.location.search.substring(1).split('&'), Query;
        for (var i in Queries) {
            Query = Queries[i].split('=');
            if (Query[0] == KeyName) return unescape(Query[1]);
        }
    }
    return null;
}