<meta charset="utf-8">
<script>
function linebreak(){
document.write("<br>");
}
function show(text){
document.write(text);
linebreak();
}
alert("Programa que mostra todos os números pares de 1 a 100!");
var counter = 2;
while (counter <= 100) {
show(counter);
counter = counter + 2;
}
linebreak();
show("FIM");
</script>
