Math.ceil()
The Math.ceil() method is the ceiling function. Math.ceil() rounds numbers up to the nearest integer value.
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
<script type="text/javascript">
document.writeln(Math.ceil(25.9)); //26
document.writeln(Math.ceil(25.5)); //26
document.writeln(Math.ceil(25.1)); //26
</script>
</head>
<body>
</body>
</html>