text: const menu_1 = document.getElementById('menu_box_a');
  const menu_2 = document.getElementById('menu_box_e');
  const menu_3 = document.getElementById('menu_box_i');
  const menu_4 = document.getElementById('menu_box_m');
  const menu_5 = document.getElementById('menu_box_q');
  const menu_6 = document.getElementById('menu_box_v');
  
  const menus = [menu_1, menu_2, menu_3, menu_4, menu_5, menu_6];
  const menuL = menus.length;
  
  function menu_display(x){
    if (x.style.display=="none") {
      x.style.display = "block";
    } else {
      x.style.display = "block";
    }
  }
  
  function menu_hide(x){
    if (x.style.display == "block"){
      x.style.display = "none";
    } else {
      x.style.display = "none";
    }
  }
  
  function view_menu(menu){
    for (i=0; i < menuL; i++){
      if (menus[i]== menu){
        menu_display(menu);
      } else {
        menu_hide(menus[i]);
      }
    }
  }
  
  
  
  document.getElementById('menu_a_button').addEventListener('click', function(){ view_menu(menu_1);});
  document.getElementById('menu_e_button').addEventListener('click', function(){ view_menu(menu_2);});
  document.getElementById('menu_i_button').addEventListener('click', function(){ view_menu(menu_3);});
  document.getElementById('menu_m_button').addEventListener('click', function(){ view_menu(menu_4);});
  document.getElementById('menu_q_button').addEventListener('click', function(){ view_menu(menu_5);});
  document.getElementById('menu_v_button').addEventListener('click', function(){ view_menu(menu_6);});
  