function parseQS(query) {
    query = ( query[0] == '?' ? query.substr(1) : query ).split('&');
    var i = query.length, temp, obj = {};

    while (i--) {
        temp = query[i].split('=');
        obj[ temp[0] ] = decodeURIComponent( temp[1] );
    }

    return obj;
}

function buildQS(obj) {
    var parts = [], name;

    for (name in obj) {
        parts.push( name + '=' + encodeURI( obj[name] ) );
    }

    return '?' + parts.join('&');
}