function copySheets() {
  var copySheetsContaining = Browser.inputBox("Copy sheets with names containing:");
  var destinationId = Browser.inputBox("Enter the destination spreadsheet ID:");
  if (sheetMatch(copySheetsContaining)){
    for (var i = 0; i < sheetsCount; i++){
      var sheet = sheets[i];
      var sheetName = sheet.getName();
      Logger.log(sheetName);
      if (sheetName.indexOf(copySheetsContaining.toString()) !== -1){
        Logger.log("COPY!");
        var destination = SpreadsheetApp.openById(destinationId);
        sheet.copyTo(destination);
      }
    }
    successAlert('copied')
  } else {
    noMatchAlert();
  }
}

// determine if any sheets match the user input
function sheetMatch(sheetMatch){
  for (var i = 0; i < sheetsCount; i++){
    var sheetName = sheets[i].getName();
    if (sheetName.indexOf(sheetMatch.toString()) !== -1){
      return true
    }
  }
  return false
}

// alert if no sheets matched the user input
function noMatchAlert() {
  var ui = SpreadsheetApp.getUi();
  var result = ui.alert(
     'No Sheets Matched Your Input',
     "Try again and make sure you aren't using quotes.",
      ui.ButtonSet.OK);
}

// alert after succesful action (only used in copy)
function successAlert(action) {
  var ui = SpreadsheetApp.getUi();
  var result = ui.alert(
     'Success!',
     "You're sheets were " + action + " successfully.",
      ui.ButtonSet.OK);
}