var cars = ["", "", "", "", ""];
cars[0] = prompt("Digite o carro", "Aqui");
cars[1] = prompt("Digite o carro", "Aqui");
cars[2] = prompt("Digite o carro", "Aqui");
cars[3] = prompt("Digite o carro", "Aqui");
cars[4] = prompt("Digite o carro", "Aqui");
document.getElementById("demo").innerHTML = cars;