Hi Humphrey Ocansey
You try this example it will work ...........
<!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" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<meta name="author" content="Naveen Siwas" />
<title>javascript grade</title>
</head>
<body>
<script type="text/javascript">
function my_function(){
var num= document.loopform.chk_num.value;
if (num >=90 && num<=100) {
alert("You scored A Grade");
}
else if (num >=80 && num<=89) {
alert("You scored B Grade");
}
else if (num >=70 && num<=79) {
alert("You scored C Grade");
}
else if (num >=60 && num<=69) {
alert("You scored D Grade");
}
else if (num >=50 && num<=59) {
alert("You scored E Grade");
}
else{
alert("You scored F Grade");
}
}
</script>
<div align="center">
<form name="loopform">
Enter any number to check your grade : <input type="text" size="30" name="chk_num" />
<input type="button" value="Check Grade" onclick="return my_function();" />
</form>
</div>
</body>
</html>
