VERSION 2.O

<SCript>
    function imprimir(frase){
        document.write(frase);
    }
    var secreto = [3,5,7,9];

    var input =document.querySelector("input");
    input.focus();

    function verificar(){
        if(parseInt(input.value) == secreto1){
        alert("usted acerto")
        }
        else {
            alert("usted erro")
        }
    input.value = "";
    input.focus();
    }
    var button = document.querySelector("button");
    button.onClick = verificar;    
</SCript>