function CheckWorkFile() {
        var obj = document.getElementById('FileUpload1');
        if (obj.value == '') {
            alert('請選擇要上傳的檔案');
            return false;
        }
        var stuff = obj.value.substr(obj.value.length-3, 3);
        if (stuff != 'xls') {
            alert('檔案型別不正確，請選擇xls檔案');
            return false;
        }
        return true;
    }