<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<script>
for (var a = 1; a <= 5; a++) {
for (var b = 1; b <= a; b++) {
document.write(b + " ");
}
document.write("<br>");
}
</script>
</head>
<body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<script>
for (var a = 1; a <= 5; a++) {
for (var b = 1; b <= a; b++) {
document.write(a + " ");
}
document.write("<br>");
}
</script>
</head>
<body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<script>
for (var a = 5; a >= 1; a--) {
for (var b = 1; b <= a; b++) {
document.write(a + " ");
}
document.write("<br>");
}
</script>
</head>
<body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
<script>
for (var a = 5; a >= 1; a--) {
for (var b = a; b >= 1; b--) {
document.write(b + " ");
}
document.write("<br>");
}
</script>
</head>
<body>
</body>
</html>