function searchGoods(formName, target, keyword) {
    var form = getElement(formName);
    if (typeof target != 'undefined') {
        form.target.value = target;
    }
    if (typeof keyword != 'undefined') {
        form.keyword.value = keyword;
    }
    if (form.keyword.value == '') {
        alert('請輸入影片搜尋的關鍵字!');
        return;
    }
    ScreenConvert();
    form.submit();
}