//Crea la lista desordenada del menú lateral colgándola del div con id=nav
var lista=nav.appendChild(document.createElement("ul"));
//Crea un arbol DOM para el menú lateral
var l1=lista.appendChild(document.createElement("li"));
var a1=l1.appendChild(document.createElement("a"));
var l2=lista.appendChild(document.createElement("li"));
var a2=l2.appendChild(document.createElement("a"));
var l3=lista.appendChild(document.createElement("li"));
var a3=l3.appendChild(document.createElement("a"));
var l4=lista.appendChild(document.createElement("li"));
var a4=l4.appendChild(document.createElement("a"));
var l5=lista.appendChild(document.createElement("li"));
var a5=l5.appendChild(document.createElement("a"));
var l6=lista.appendChild(document.createElement("li"));
var a6=l6.appendChild(document.createElement("a"));
var l7=lista.appendChild(document.createElement("li"));
var a7=l7.appendChild(document.createElement("a"));
var l8=lista.appendChild(document.createElement("li"));
var a8=l8.appendChild(document.createElement("a"));
var l9=lista.appendChild(document.createElement("li"));
var a9=l9.appendChild(document.createElement("a"));
var l10=lista.appendChild(document.createElement("li"));
var a10=l10.appendChild(document.createElement("a"));
var l11=lista.appendChild(document.createElement("li"));
var a11=l11.appendChild(document.createElement("a"));
var l12=lista.appendChild(document.createElement("li"));
var a12=l12.appendChild(document.createElement("a"));
var l13=lista.appendChild(document.createElement("li"));
var a13=l13.appendChild(document.createElement("a"));
var l14=lista.appendChild(document.createElement("li"));
var a14=l14.appendChild(document.createElement("a"));
var l15=lista.appendChild(document.createElement("li"));
var a15=l15.appendChild(document.createElement("a"));
var l16=lista.appendChild(document.createElement("li"));
var a16=l16.appendChild(document.createElement("a"));
var l17=lista.appendChild(document.createElement("li"));
var a17=l17.appendChild(document.createElement("a"));
var l18=lista.appendChild(document.createElement("li"));
var a18=l18.appendChild(document.createElement("a"));
var l19=lista.appendChild(document.createElement("li"));
var a19=l19.appendChild(document.createElement("a"));
var l20=lista.appendChild(document.createElement("li"));
var a20=l20.appendChild(document.createElement("a"));
var l21=lista.appendChild(document.createElement("li"));
var a21=l21.appendChild(document.createElement("a"));
var l22=lista.appendChild(document.createElement("li"));
var a22=l22.appendChild(document.createElement("a"));
var l23=lista.appendChild(document.createElement("li"));
var a23=l23.appendChild(document.createElement("a"));
var l24=lista.appendChild(document.createElement("li"));
var a24=l24.appendChild(document.createElement("a"));
var l25=lista.appendChild(document.createElement("li"));
var a25=l25.appendChild(document.createElement("a"));
var l26=lista.appendChild(document.createElement("li"));
var a26=l26.appendChild(document.createElement("a"));
var l27=lista.appendChild(document.createElement("li"));
var a27=l27.appendChild(document.createElement("a"));
var l28=lista.appendChild(document.createElement("li"));
var a28=l28.appendChild(document.createElement("a"));
var l29=lista.appendChild(document.createElement("li"));
var a29=l29.appendChild(document.createElement("a"));
var l30=lista.appendChild(document.createElement("li"));
var a30=l30.appendChild(document.createElement("a"));
var l31=lista.appendChild(document.createElement("li"));
var a31=l31.appendChild(document.createElement("a"));
var l32=lista.appendChild(document.createElement("li"));
var a32 =l32.appendChild(document.createElement("a"));
var l33=lista.appendChild(document.createElement("li"));
var a33=l33.appendChild(document.createElement("a"));
var l34=lista.appendChild(document.createElement("li"));
var a34=l34.appendChild(document.createElement("a"));
var l35=lista.appendChild(document.createElement("li"));
var a35=l35.appendChild(document.createElement("a"));
var l36=lista.appendChild(document.createElement("li"));
var a36=l36.appendChild(document.createElement("a"));
var l37=lista.appendChild(document.createElement("li"));
var a37=l37.appendChild(document.createElement("a"));
var l38=lista.appendChild(document.createElement("li"));
var a38=l38.appendChild(document.createElement("a"));
var l39=lista.appendChild(document.createElement("li"));
var a39=l39.appendChild(document.createElement("a"));
var l40=lista.appendChild(document.createElement("li"));
var a40=l40.appendChild(document.createElement("a"));
var l41=lista.appendChild(document.createElement("li"));
var a41=l41.appendChild(document.createElement("a"));
var l42=lista.appendChild(document.createElement("li"));
var a42=l42.appendChild(document.createElement("a"));
var l43=lista.appendChild(document.createElement("li"));
var a43=l43.appendChild(document.createElement("a"));
var l44=lista.appendChild(document.createElement("li"));
var a44=l44.appendChild(document.createElement("a"));
var l45=lista.appendChild(document.createElement("li"));
var a45=l45.appendChild(document.createElement("a"));
var l46=lista.appendChild(document.createElement("li"));
var a46=l46.appendChild(document.createElement("a"));
var l47=lista.appendChild(document.createElement("li"));
var a47=l47.appendChild(document.createElement("a"));
var l48=lista.appendChild(document.createElement("li"));
var a48=l48.appendChild(document.createElement("a"));
var l49=lista.appendChild(document.createElement("li"));
var a49=l49.appendChild(document.createElement("a"));
//Crea los enlaces y las leyendas del menú lateral
a1.className="first";
a1.href="abel.htm";
a1.innerHTML="Abel";
a2.href="ackerman.htm";
a2.innerHTML="Ackermann";
a3.href="al_banna.htm";
a3.innerHTML="Al Banna";
a4.href="artin.htm";
a4.innerHTML="Artin";
a5.href="bhaskara.htm";
a5.innerHTML="Bhaskara";
a6.href="binet.htm";
a6.innerHTML="Binet";
a7.href="buchberger.htm";
a7.innerHTML="Buchberger";
a8.href="burnside.htm";
a8.innerHTML="Burnside";
a9.href="cardano.htm";
a9.innerHTML="Cardano";
a10.href="cauchy.htm";
a10.innerHTML="Cauchy";
a11.href="cayley.htm";
a11.innerHTML="Cayley";
a12.href="moivre.htm";
a12.innerHTML="De Moivre";
a13.href="dewey.htm";
a13.innerHTML="Dewey";
a14.href="euler.htm";
a14.innerHTML="Euler";
a15.href="fermat.htm";
a15.innerHTML="Fermat";
a16.href="ferrari.htm";
a16.innerHTML="Ferrari";
a17.href="ferro.htm";
a17.innerHTML="Ferro";
a18.href="fibonacci.htm";
a18.innerHTML="Fibonacci";
a19.href="frobenius.htm";
a19.innerHTML="Frobenius";
a20.href="galois.htm";
a20.innerHTML="Galois";
a21.href="gauss.htm";
a21.innerHTML="Gauss";
a22.href="grobner.htm";
a22.innerHTML="Gröbner";
a23.href="heron.htm";
a23.innerHTML="Herón";
a24.href="holder.htm";
a24.innerHTML="Hölder";
a25.href="hopper.htm";
a25.innerHTML="Hopper";
a26.href="jordan.htm";
a26.innerHTML="Jordan";
a27.href="klein.htm";
a27.innerHTML="Klein";
a28.href="knuth.htm";
a28.innerHTML="Knuth";
a29.href="kronecker.htm";
a29.innerHTML="Kronecker";
a30.href="lagrange.htm";
a30.innerHTML="Lagrange";
a31.href="lucas.htm";
a31.innerHTML="Lucas";
a32.href="markov.htm";
a32.innerHTML="Markov";
a33.href="mercator.htm";
a33.innerHTML="Mercator";
a34.href="mersenne.htm";
a34.innerHTML="Mersenne";
a35.href="newton.htm";
a35.innerHTML="Newton";
a36.href="emmy_noether.htm";
a36.innerHTML="Noether";
a37.href="pitagoras.htm";
a37.innerHTML="Pitágoras";
a38.href="ramanujan.htm";
a38.innerHTML="Ramanujan";
a39.href="ruffini.htm";
a39.innerHTML="Ruffini";
a40.href="schreier.htm";
a40.innerHTML="Schreier";
a41.href="steinitz.htm";
a41.innerHTML="Steinitz";
a42.href="sylow.htm";
a42.innerHTML="Sylow";
a43.href="snyder.htm";
a43.innerHTML="Snyder";
a44.href="tartaglia.htm";
a44.innerHTML="Tartaglia";
a45.href="von_dick.htm";
a45.innerHTML="Von Dick";
a46.href="von_neumann.htm";
a46.innerHTML="Von Neumann";
a47.href="wielandt.htm";
a47.innerHTML="Wielandt";
a48.href="zassenhaus.htm";
a48.innerHTML="Zassenhaus";
a49.href="zelmanov.htm";
a49.innerHTML="Zelmanov";
//Crea el div, la lista desordenanda superior del menú y el arbol DOM correspondiente