function alteraTamanhoFonte(acao) {
  var tamanho = new Array();
  tamanho = ["small", "default", "big"];
  var i, pos, current;
  current = getActiveStyleSheet();
  for (i=0; i < tamanho.length; i++) {
	if (tamanho[i] == current) { pos = i; } 
  }
  if (acao == "mais") {
	if (pos < 2) { pos = pos + 1; } else { pos = 2; }
  } else {
	if (pos > 0) { pos = pos - 1; } else { pos = 0; }
  }
  setActiveStyleSheet(tamanho[pos]);
  for(var c=0;c<theBANK.length;c++){
    if(document.getElementById(theBANK[c][0]).style.display == 'none'){
      document.getElementById(theBANK[c][0]).style.overflow = 'visible';
      document.getElementById(theBANK[c][0]).style.display = 'block';
      document.getElementById(theBANK[c][0]).style.height = null;
      theHEIGHT=document.getElementById(theBANK[c][0]).offsetHeight;
      theBANK[c][1]=theHEIGHT+"px";
      document.getElementById(theBANK[c][0]).style.overflow = 'hidden';
      document.getElementById(theBANK[c][0]).style.display = 'none';
      document.getElementById(theBANK[c][0]).style.height = "0px";
    }else{
      document.getElementById(theBANK[c][0]).style.overflow = 'visible';
      document.getElementById(theBANK[c][0]).style.display = 'block';
      document.getElementById(theBANK[c][0]).style.height = null;
      theHEIGHT=document.getElementById(theBANK[c][0]).offsetHeight;
      theBANK[c][1]=theHEIGHT+"px";
      document.getElementById(theBANK[c][0]).style.height = theBANK[c][1];
      document.getElementById(theBANK[c][0]).style.overflow = 'hidden';
    }
  }
  //document.getElementById('OverlayContainer').style.height = document.height+'px'; //atualizar altura do overlay ao manipular tamanho das fontes
}

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;
    }
  }
}

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;
}

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;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);