function listarRacas(animal){
	var args=({
		url:"exibe_racas.php?id=" + animal,
		timeout:5000,
	
		load:function(response, ioArgs){
			document.getElementById("div_raca").innerHTML=response;
		}, 
		error: function(response, ioArgs) {
    		console.error("HTTP status code: ", ioArgs.xhr.status);
     		document.getElementById("div_raca").innerHTML=response;
     	}
	});
	dojo.xhrGet(args);
}