<meta charset="utf-8">
<input/>
<button>Verificar si acerto</button>
<script>
function saltarlinea() {
document.write("<br>");
document.write("<br>");
document.write("<br>");
}
function imprimir(frase) {
document.write(frase);
saltarlinea();
}
function verificar() {
if (parseInt(input.value) == secreto) {
alert("Usted acerto");
}
else {
alert("Usted erro");
}
input.value = "";
input.focus();
}
var secreto = Math.round(Math.random()*10);
var input = document.querySelector("input");
var button = document.querySelector("button");
input.focus();
button.onclick = verificar;
</script>
