function togglePurDec2(cat){
  if (cat == "info"){
    document.getElementById("livros-info").style.display = "block";
    document.getElementById("livros-adm").style.display = "none";
    document.getElementById("viewlet-livrostab-adm-a").className = "nselected";
    document.getElementById("viewlet-livrostab-info-a").className = "selected";
  }
  if (cat == "adm"){
    document.getElementById("livros-adm").style.display = "block";
    document.getElementById("livros-info").style.display = "none";
    document.getElementById("viewlet-livrostab-adm-a").className= "selected";
    document.getElementById("viewlet-livrostab-info-a").className= "nselected";
  }
}