var openImg   = new Image();
openImg.src   = "imagens/folder_aberto.gif";
var closedImg = new Image();
closedImg.src = "imagens/folder_fechado.gif";
   
function showBranch(Oculto)
{
  var objBranch = document.getElementById(Oculto).style;
  if(objBranch.display=="block")
    objBranch.display="none";
  else
    objBranch.display="block";
}
   
function swapFolder(Imagem)
{
  objImg = document.getElementById(Imagem);
  if(objImg.src.indexOf('folder_fechado.gif')>-1)
    objImg.src = openImg.src;
  else
    objImg.src = closedImg.src;
}

function expandAll(Qtd)
{
  for (Ind=1;Ind<=Qtd;Ind++)
  {
    objBranch = document.getElementById("oculto_"+Ind).style;
    objBranch.display="block";
    objImg = document.getElementById("pasta_"+Ind);
    objImg.src = openImg.src;
  }
}

function collapseAll(Qtd)
{
  for (Ind=1;Ind<=Qtd;Ind++)
  {
    objBranch = document.getElementById("oculto_"+Ind).style;
    objBranch.display="none";
    objImg = document.getElementById("pasta_"+Ind);
    objImg.src = closedImg.src;
  }
}