function mostrar (num){
  if (num == 'aj2r'){
      document.getElementById('todo').className = "aj2r";
      document.getElementById('mostrar').innerHTML="blog ::: http://aj2r.wordpress.com";
      document.getElementById('todo').innerHTML="";
  }
  if (num =='mapas'){
      document.getElementById('todo').className = "maps";
      document.getElementById('mostrar').innerHTML="http://aj2r.es/maps/";
      document.getElementById('todo').innerHTML="";
  }
  if (num =="itis"){
      document.getElementById('todo').className = "itis";
      document.getElementById('mostrar').innerHTML="Servidor de descargas I.T.I.S.";
      document.getElementById('todo').innerHTML="";
  }
}

function esconder(){
  document.getElementById('mostrar').innerHTML=" ";
  document.getElementById('todo').className = "todo";
  document.getElementById('todo').innerHTML="aj2r";
}