function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
  //desmarcamos el subrayado del tipo de fuente activa
  document.getElementById("marca_FuentesGrandes").style.backgroundColor = "";
  document.getElementById("marca_FuentesMedianas").style.backgroundColor = "";
  document.getElementById("marca_FuentesPequenias").style.backgroundColor = "";
  
  //marcamos la fuente activa
  document.getElementById("marca_" + title).style.backgroundColor = "rgb(116, 132, 180)";
  
  //Si al cambiar de tamaņo de letra el div contenedor no tiene scroll lo ocultamos (por ahora solo cosigo que chute en FireFox)
  //var h = document.getElementById('contenedorConScroll').style.height.replace("px","");
  //if (document.getElementById('contenedorConScroll').scrollHeight <= h){
  //    document.getElementById('contenedorConScroll').style.overflow = "auto";
  //}
}


function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  //var i, a;
  //for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
  //  if(a.getAttribute("rel").indexOf("style") != -1
  //     && a.getAttribute("rel").indexOf("alt") == -1
  //     && a.getAttribute("title")
  //     ) return a.getAttribute("title");
  //}
  //return null;
  return "FuentesMedianas";
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}