codigo felipe
var heroes = ["Superman", "Thor", "Batman", "Mujer Maravilla"];
for( var i = 1; i < heroes.length; i++) {
alert(heroes[i]);
}
forma correcta
var heroes = ["Superman", "Thor", "Batman", "Mujer Maravilla"];
for( var i = 0; i < heroes.length; i++) {
alert(heroes[i]);
}