在脚本中指定Google表格标签

Question

我试图让一个脚本仅在有人编辑特定列以发送自动电子邮件通知时才查看特定的选项卡/页面。但是，它将在所有选项卡上发送有关任何编辑的电子邮件通知。如何指定工作表：“ CT-培训”

function sendNotification() {
    var ss = SpreadsheetApp.getActiveSpreadsheet();
    var sheet = activeSpreadsheet.getSheetByName('CT - Training');
    //Get Active cell
    var mycell = ss.getActiveSelection();
    var cellcol = mycell.getColumn();
    var cellrow = mycell.getRow();
    //Define Notification Details
    var recipients = "email@email.email";
    var subject = "Update to "+ss.getName();
    var body = ss.getName() + "has been updated.  Visit " + ss.getUrl() + " to view the changes.";
    //Check to see if column is A or B to trigger
    if (cellcol == 17);
      //Check to see if column is A or B to trigger
      if (cellcol == 20);
      {
        //Send the Email
        MailApp.sendEmail(recipients, subject, body);
      }
    //End sendNotification
 }