Could someone please help me with this. Please. It works until I try to use the extra 3 % on B,C,D, and so on. I can't figure out what is wrong.
I am sure it is probably something small but I cannot find it. Thank You.
Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/javascript; charset=iso-8859-1" />
<title>Untitled Document</title>
<script type="text/javascript"  >
function check_grade()
{
	 var percent = document.gradeForm.percent.value;
	 var percent = parseFloat(percent);
	 var absences = document.gradeForm.absences.value;
	 var absences = parseInt(absences);
	
		if (absences >= 5) 
		{
			document.gradeForm.comments.value = "You have an F because of excessive absentees";
		}
	    else if (percent >= 90 && percent <= 100 && absences <= 2)
		{
			document.gradeForm.comments.value = "You have gained 3% to your percent for having few absences.\n" +
			"Your Grade: A, Your Percent:" +(percent * 1.03).toFixed(2);
		}
		else if (percent >= 90 && percent <= 100)
			document.gradeForm.comments.value = "Your Grade: A, Your Percent:" + percent;
		else if (percent <= 89.9 && percent  >= 80)
		{
			document.gradeForm.comments.value = "Your Grade: B, Your percent:" + percent;
		}
		else if (percent <= 89.9 && percent >= 80 && absences <= 2)
		{
			document.gradeForm.comments.value = "You have gained 3% to your percent for having few absences.\n" +
			"Your Grade: B, Your Percent:" + (percent * 1.03).toFixed(2);
		}
		else if (percent <= 79.9 && percent >= 70)
		{
			document.gradeForm.comments.value = "Your Grade: C, Your Percent:" + percent;
		}
		else if (percent <= 79.9 && percent >= 70 && absences <= 2)
		{
			document.gradeForm.comments.value = "You have gained 3% to your percent for having few absences.\n" +
			"Your Grade: C, Your Percent:" + parseInt(percent * 1.03).toFixed(2);
		}
		else if (percent <= 69.9 && percent >= 60)
		{
			document.gradeForm.comments.value = "Your Grade: D, Your Percent:" + percent;
		}
		else if (percent <= 69.9 && percent >= 60 && absences <= 2)
		{
			document.gradeForm.comments.value = "You have gained 3% to your percent for having few absences.\n" +
			"Your Grade: D, Your Percent:" +(percent * 1.03).toFixed(2);
		}
		else 
		{
			document.gradeForm.comments.value = "I am sorry you have fail this semester.\n" +
			"Your Grade: F, Your Percent:" + percent;
		}
		}
</script>
</head>

<body>		
   <form name="gradeForm" action="#">
   <label for="absences">How many absences do you have?: </label><br />
   <input type="text" name="absences" /><br />
   <label for="percent">What is your grade percent? </label><br />
   <input type="text" name="percent" /><br />
   <textarea id="comments" rows = "5" cols = "20"></textarea>
    <input type="button" value="Check Grade" id="checkGradeButton"  onclick="check_grade()" />
  
</form>
</body>
</html>