function montarlistadomasvendidos (libros) {
  var half = (libros.length - 1) / 2;

  for (i = 1; i <= half; i++) {
    var j = i + half;

    document.write(
        "<div class=\"mvline\">" +
        "<div class=\"mved1\"><img src=\"editoriales/" + libros[i][3] + ".gif\"></div>" +
        "<div class=\"mvtit1\">" + libros[i][0] + "</div>" +
        "<div class=\"mvaut1\">" + libros[i][1] + "</div>" +
        "<div class=\"mvpos1\">" + i + "</div>" +
        "<div class=\"mvper1\">" + libros[i][2] + "</div>" +
        "<div class=\"mvsep\"></div>" +
        "<div class=\"mvpos2\">" + j + "</div>"+
        "<div class=\"mvper2\">" + libros[j][2] + "</div>" +
        "<div class=\"mvtit2\">" + libros[j][0] + "</div>" +
        "<div class=\"mvaut2\">" + libros[j][1] + "</div>" +
        "<div class=\"mved2\"><img src=\"editoriales/" + libros[j][3] + ".gif\"></div>" +
        "</div>"
    );
  }
}