如何在 UI 应用程序中生成多个下拉列表框

我一直在使用示例代码，以允许用户以谷歌表单提交照片以更新到谷歌电子表格。我正在使用Serge Insas的原始代码，我能够完全按照他的意图工作。现在我正在尝试使用它以满足我的需求，这只是拥有多个下拉列表，我需要捕获比原始代码允许的信息更多的信息。我对此很陌生，并且通过反复试验来做大多数事情。我可以让表单显示两个列表框，但它们的下拉列表是相同的（List1）

这是我修改的代码，它将发布在第二个列表框中选择的内容，但我需要显示 list2 中的项目。任何帮助将不胜感激。

谢谢

var submissionSSKey = '0ArbqJejC7zBydGNUbVpwd2hrQ3RFY3VxZ0RCeU5aV3c';
var docurl = 'https://docs.google.com/document/d/13FWMTtzprlhN73cMp73zPtunsOcoAFO5PCROp1PHiv4/'
var listitems = ['Select a category', 'LKQ', 'AM', 'OEM']
var listitems2 = ['Select a category', 'Wrong Part', 'Poor Fit', 'Poor Quality']
var Panelstyle = {
    'background': '#dddddd',
    'padding': '40px',
    'borderStyle': 'solid',
    'borderWidth': '10PX',
    'borderColor': '#bbbbbb'
}
function doGet() {
    var app = UiApp.createApplication().setTitle('Parts Return Reasons').setStyleAttribute('padding', '50PX');
    var panel = app.createFormPanel().setStyleAttributes(Panelstyle).setPixelSize(400, 200);
    var title = app.createHTML('<B>PartsReturnReasons</B>').setStyleAttribute('color', 'grey').setStyleAttribute('fontSize', '25PX');
    var grid = app.createGrid(7, 2).setId('grid');
    var list1 = app.createListBox().setName('list1').setWidth('130');
    for (var i in listitems) {
        list1.addItem(listitems[i])
    }
    var list2 = app.createListBox().setName('list2').setWidth('130');
    for (var i in listitems2) {
        list2.addItem(listitems[i])
    }
    var Textbox1 = app.createTextBox().setWidth('150px').setName('TB1');
    var email = app.createTextBox().setWidth('150px').setName('mail');
    var upLoad = app.createFileUpload().setName('uploadedFile');
    var submitButton = app.createSubmitButton('<B>Submit</B>');
    var warning = app.createHTML('Please fill in all fields').setStyleAttribute('background', '#bbbbbb').setStyleAttribute('fontSize', '18px');
    //file upload
    var cliHandler2 = app.createClientHandler()
        .validateLength(Textbox1, 1, 40).validateNotMatches(list1, 'Select a category').validateEmail(email).validateNotMatches(upLoad, 'FileUpload')
        .forTargets(submitButton).setEnabled(true)
        .forTargets(warning).setHTML('Now you can submit your form').setStyleAttribute('background', '#99FF99').setStyleAttribute('fontSize', '12px');
    //Grid layout of items on form
    grid.setWidget(0, 1, title)
        .setText(1, 0, 'Category')
        .setWidget(1, 1, list1.addClickHandler(cliHandler2))
        .setText(2, 0, 'Reason')
        .setWidget(2, 1, list2.addClickHandler(cliHandler2))
        .setText(3, 0, 'Name')
        .setWidget(3, 1, Textbox1.addClickHandler(cliHandler2))
        .setText(4, 0, 'Email')
        .setWidget(4, 1, email)
        .setText(5, 0, 'Image File')
        .setWidget(5, 1, upLoad.addChangeHandler(cliHandler2))
        .setWidget(6, 0, submitButton)
        .setWidget(6, 1, warning);
    var cliHandler = app.createClientHandler().forTargets(warning).setHTML('<B>PLEASE WAIT WHILE THE FILE IS UPLOADING<B>').setStyleAttribute('background', 'yellow');
    submitButton.addClickHandler(cliHandler).setEnabled(false);
    panel.add(grid);
    app.add(panel);
    return app;
}

function doPost(e) {
    var app = UiApp.getActiveApplication();
    var ListVal1 = e.parameter.list1;
    var ListVal2 = e.parameter.list2;
    var textVal = e.parameter.TB1;
    var Email = e.parameter.mail;
    var fileBlob = e.parameter.uploadedFile;
    var blob = fileBlob.setContentTypeFromExtension()
    var img = DocsList.createFile(blob);
    try {
        var folder = DocsList.getFolder('photos');
    } catch (e) {
        DocsList.createFolder('photos');
        var folder = DocsList.getFolder('photos')
    }
    img.addToFolder(folder);
    img.removeFromFolder(DocsList.getRootFolder());
    var weight = parseInt(img.getSize() / 1000);
    var sheet = SpreadsheetApp.openById(submissionSSKey).getSheetByName('Sheet1');
    var lastRow = sheet.getLastRow();
    var targetRange = sheet.getRange(lastRow + 1, 1, 1, 5).setValues([
        [ListVal1, ListVal2, textVal, Email, "https://drive.google.com/uc?export=view&id=" + img.getId()]
    ]);
    var imageInsert = sheet.getRange(lastRow + 1, 5).setFormula('=image("https://drive.google.com/uc?export=view&id=' + img.getId() + '")');
    sheet.setRowHeight(lastRow + 1, 80);
    var GDoc = DocumentApp.openByUrl(docurl)
    GDoc.appendTable([
        ['Category : ' + ListVal1, ListVal2, 'Name : ' + textVal, 'Email : ' + Email]
    ])
    var inlineI = GDoc.appendImage(img);
    var width = inlineI.getWidth();
    var newW = width;
    var height = inlineI.getHeight();
    var newH = height;
    var ratio = width / height;
    Logger.log('w=' + width + 'h=' + height + ' ratio=' + ratio);
    if (width > 640) {
        newW = 640;
        newH = parseInt(newW / ratio);
    }
    inlineI.setWidth(newW).setHeight(newH)
    GDoc.appendParagraph('IMAGE size : ' + width + ' x ' + height + ' (eventually) resized to ' + newW + ' x ' + newH + ' for PREVIEW (' + weight + ' kB)   ');
    GDoc.appendHorizontalRule();
    GDoc.saveAndClose();
    app.add(app.createLabel('Thank you for submitting'));
    return app;
}