function mmLoadMenus() {
  if (window.mm_menu_0218145715_0) return;
  window.mm_menu_0218145715_0 = new Menu("root",115,20,"Arial, Helvetica, sans-serif",14,"#ffcc99","#990000","#990000","#66ccff","left","middle",3,0,1000,0,0,false,true,true,5,true,true);
  mm_menu_0218145715_0.addMenuItem("Exercises","location='ejercicios.htm'");
  mm_menu_0218145715_0.addMenuItem("Periodic Table","location='tabla_periodica.htm'");
  mm_menu_0218145715_0.addMenuItem("Links","location='vinculos.htm'");
   mm_menu_0218145715_0.fontWeight="bold";
   mm_menu_0218145715_0.hideOnMouseOut=true;
   mm_menu_0218145715_0.menuBorder=1;
   mm_menu_0218145715_0.menuLiteBgColor='#ffffff';
   mm_menu_0218145715_0.menuBorderBgColor='#555555';
   mm_menu_0218145715_0.bgColor='#999999';
  window.mm_menu_0218144747_1 = new Menu("root",237,20,"Arial, Helvetica, sans-serif",14,"#ffcc99","#990000","#990000","#66ccff","left","middle",3,0,1000,0,0,false,true,true,5,true,true);
  mm_menu_0218144747_1.addMenuItem("Elementary substances","location='substancias_simples.htm'");
  mm_menu_0218144747_1.addMenuItem("Metal oxides","location='oxidos_basicos.htm'");
  mm_menu_0218144747_1.addMenuItem("Nonmetal oxides","location='oxidos_acidos.htm'");
  mm_menu_0218144747_1.addMenuItem("Metal-nonmetal compounds","location='metal_no_metal.htm'");
  mm_menu_0218144747_1.addMenuItem("Nonmetal-nonmetal compounds","location='no_metal_no_metal.htm'");
  mm_menu_0218144747_1.addMenuItem("Metal hydrides","location='hidruros.htm'");
  mm_menu_0218144747_1.addMenuItem("Hydracids","location='hidracidos.htm'");
  mm_menu_0218144747_1.addMenuItem("H with nonmetal","location='h_non_metal.htm'");
  mm_menu_0218144747_1.addMenuItem("Hydroxides","location='hidroxidos.htm'");
  mm_menu_0218144747_1.addMenuItem("Oxyacids","location='oxacidos.htm'");
  mm_menu_0218144747_1.addMenuItem("Oxysalts","location='oxisales_neutras.htm'");
  mm_menu_0218144747_1.addMenuItem("Acid salts","location='oxisales_acidas.htm'");
   mm_menu_0218144747_1.fontWeight="bold";
   mm_menu_0218144747_1.hideOnMouseOut=true;
   mm_menu_0218144747_1.menuBorder=1;
   mm_menu_0218144747_1.menuLiteBgColor='#ffffff';
   mm_menu_0218144747_1.menuBorderBgColor='#555555';
   mm_menu_0218144747_1.bgColor='#999999';
  window.mm_menu_0218144113_2 = new Menu("root",222,20,"Arial, Helvetica, sans-serif",14,"#ffcc99","#990000","#990000","#66ccff","left","middle",3,0,1000,0,0,false,true,true,5,true,true);
  mm_menu_0218144113_2.addMenuItem("Home","location='index.html'");
  mm_menu_0218144113_2.addMenuItem("Introduction","location='introduccion.htm'");
  mm_menu_0218144113_2.addMenuItem("Oxidation number","location='numero_oxidacion.htm'");
  mm_menu_0218144113_2.addMenuItem("The mechanics of formulation","location='mecanica.htm'");
  mm_menu_0218144113_2.addMenuItem("Kind of substances","location='tipos_de_substancias.htm'");
   mm_menu_0218144113_2.fontWeight="bold";
   mm_menu_0218144113_2.hideOnMouseOut=true;
   mm_menu_0218144113_2.menuBorder=1;
   mm_menu_0218144113_2.menuLiteBgColor='#ffffff';
   mm_menu_0218144113_2.menuBorderBgColor='#555555';
   mm_menu_0218144113_2.bgColor='#999999';

  mm_menu_0218144113_2.writeMenus();
} // mmLoadMenus()