Untitled

<!DOCTYPE html>
<html>
<head>
    <title>Buat Fungsi PBO (M. Hafidz Fadillah - XI RPL 2)</title>
    <link rel="stylesheet" type="text/css" href="BuatIf.css">
</head>
<div class="bgtest">
<body>
    <input type="text" id="nilai">
    <input type="button" id="nilai" value="Ambil nilai" onclick="ambilNilai();"/>

    <script type="text/javascript" language="javascript">
        function ambilNilai() {
            var objNilai = document.getElementById('');
            var n = objNilai.value;
            alert("nilainya adalah "+ n);
        }
    </script>
</body>
</div>
</html>