In this assignment you will be given a program that asks for a test score (0 to 100) and will print out an A if the score is 90 or better, a B if the score is in the 80s, and a message that the score is failing if the score is below 60. You can see the program run here. Your task is to finish the program so that it prints a C for the scores in the 70s, and a D for scores in the 60s. You can copy the source code for the running program, or copy the text below into notepad:
<html>
<head>
<title> If Demo Page </title>
<script type=”text/javascript”>
function ShowMessage()
// Assumes: gradeBox contains a grade (non-negative number)
// Results: displays a warning or correct letter grade for the score
{
var grade;
grade = parseFloat(document.getElementById(‘gradeBox’).value);
if (grade < 60) {
alert(‘You failed! Time to hit the books.’);
}
if (grade>89)
{
alert(‘You got an A’);
}
if ((grade > 79) && (grade<90))
{
alert(‘You got a B’);
}
}
</script>
</head>
<body>
<p>
Your grade: <input type=”text” id=”gradeBox” size=6 value=””>
</p>
<input type=”button” value=”Click for Message” onclick=”ShowMessage();”>
</body>
</html>