google Docs code snippet

function onOpen() {
  // Add a menu with some items, some separators, and a sub-menu.
  DocumentApp.getUi().createMenu('Utilities')
      .addItem('Insert Date', 'insertAtCursor')
      .addItem('Insert Time', 'insertTimeAtCursor')
      .addItem('Insert Long Date', 'insertLDateAtCursor')
      .addItem('Insert Date and Time', 'insertDTAtCursor')
      .addToUi();
}