function onOpen() {
  var ui = SpreadsheetApp.getUi();
  // Or DocumentApp or FormApp.
  ui.createMenu('Custom Menu')
      .addItem('importresult', 'importresult')
      .addItem('importpayments', 'importpayments')
        .addItem('importpaymege', 'importpaymege')
      .addToUi();
}

function importresult() {
  
  var file = DriveApp.getFilesByName("result.csv").next();
  var csvData = Utilities.parseCsv(file.getBlob().getDataAsString());
  var sheet = SpreadsheetApp.getActiveSheet();
  sheet.getRange(1, 1, csvData.length, csvData[0].length).setValues(csvData);
  
}
function importpayments() {
  
  var file = DriveApp.getFilesByName("payments.csv").next();
  var csvData = Utilities.parseCsv(file.getBlob().getDataAsString());
  var sheet = SpreadsheetApp.getActiveSheet();
  sheet.getRange(1, 1, csvData.length, csvData[0].length).setValues(csvData);
  
}

function importpaymege() {
  
  var file = DriveApp.getFilesByName("payments_ege.csv").next();
  var csvData = Utilities.parseCsv(file.getBlob().getDataAsString());
  var sheet = SpreadsheetApp.getActiveSheet();
  sheet.getRange(1, 1, csvData.length, csvData[0].length).setValues(csvData);
  
}