function abrefecha(id,cor) //Função que mostra/esconde as tabelas
	    {
	       var tabela = document.getElementById("tb" + id);
	       if (tabela && tabela.style.display == "block")
	       {
	            document.getElementById(id).className="cinza";
				tabela.style.display = "none";
	       }
	       else
	       {
				document.getElementById(id).className="cinzaneg";
				tabela.style.display = "block";
	       }
	   }