function tianv_gopager() {
    var gpage = document.getelementbyid('gpage').value.replace(/(^\s*)|(\s*$)/g, '');
    var fpath = document.getelementbyid('fpath').value.replace(/(^\s*)|(\s*$)/g, '');

    if (!/^\d+$/.test(gpage)) {
        alert('请输入正确的页码');
        return;
    }

    var rpath = fpath.replace('page=%7bpage%7d', 'page=' + gpage);

    document.location = rpath;
}