function retornaData(){

  D = new Date();
  d_semana = new Array('Sunday, ','Monday, ','Tuesday, ','Wednesday, ','Thursday, ','Friday, ','Saturday, ');
  mes = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
  ano = D.getYear();
  
  if(ano < 1900){ano += 1900;}
  
  dia = ""
  switch(D.getDate() % 10){
    case 1 :
      dia = D.getDate() + "st";
      break;
    case 2 :
      dia = D.getDate() + "nd";
      break; 
    case 3 :
      dia = D.getDate() + "rd";
      break;
    default:  
      dia = D.getDate() + "th";
  }

  return "Brazil - " + d_semana[D.getDay()] + mes[D.getMonth()] + ", " + dia + ", " + ano;
}

function setaA(obj){
  document[obj].src = 'imagens/seta2.jpg';
}

function setaC(obj){
  document[obj].src = 'imagens/seta1.jpg';
}