Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8"/>
    <title>Percentage grade calculator</title>
    <script>
        function percentageGrade()
        {
            var HwScore, MtScore, Fscore, H, FG;

            HwScore=document.getElementById("HwScore").value;

            document.write(("H"/200)*50)

        }


    </script>
</head>
<body>
    <h1>Percentage grade calculator</h1>
<form>
<p> Enter your total Homework score: <input type="text" id="HwScore" name="Homework score" onClick=percentageGrade()></p>
    <p> Enter your midterm score: <input type="text" id="MtScore" name="Midterm score"></p>
    <p> Enter your Final score: <input type="text" id="Fscore" name="Final score"></p>
    <p> <input type="button" value="Calculate Grade" name="Calculate Grade"></p>
</form>

</body>
</html>