text: let slide_ativo = '0';
  function openNav() {
    document.getElementById("mySidenav").style.width = "300px";
  }
  
  function closeNav() {
    document.getElementById("mySidenav").style.width = "0";
  }
  function menuSelect(tgt) {
  	slide_ativo = tgt.substring(3, 6);
  	let option = document.getElementById(tgt);
  	option.selected = 1;
  	let a = document.getElementById('conteudo');
  	let b = document.getElementById('conteudo'+slide_ativo);
  	a.innerHTML = b.innerHTML;
  }
  function avancaSlide() {
  	let parse = parseInt(slide_ativo, 10)+1;
  	if (parse<32) {
  		let opt = document.getElementById('opt'+parse);
  		opt.selected = 1;
  		slide_ativo = parse;
  	}
  	let a = document.getElementById('conteudo');
  	let b = document.getElementById('conteudo'+slide_ativo);
  	a.innerHTML = b.innerHTML;
  }
  function voltaSlide() {
  	let parse = parseInt(slide_ativo, 10)-1;
  	if (parse>-1) {
  		let opt = document.getElementById('opt'+parse);
  		opt.selected = 1;
  		slide_ativo = parse;
  		let a = document.getElementById('conteudo');
  		let b = document.getElementById('conteudo'+slide_ativo);
  		a.innerHTML = b.innerHTML;
  	}
  }
  function voltarAoInicio(tgt){
  	slide_ativo = tgt.substring(3, 6);
  	let option = document.getElementById(tgt);
  	option.selected = 1;
  	let a = document.getElementById('conteudo');
  	let b = document.getElementById('conteudo0');
  	a.innerHTML = b.innerHTML;
  }