nodeName

js/script.js

function funMake() {
var ara = document.getElementById('d1').childNodes;
var val = document.getElementById('d2');
for(var i=0; i<ara.length; i++) {
if(i%2 !=0) {
val.innerHTML += '<h3>' + ara[i].nodeName + '</h3>'
}
}
}

function funMake() {
var ara = document.getElementById('d1').childNodes;
var val = document.getElementById('d2');
for(var i=0; i<ara.length; i++) {
if(i%2 !=0) {
val.innerHTML += '<h3>' + ara[i].nodeName + '</h3>'
}
}
}

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<div id="d1">
<p>Hello World!</p>
<h4>Привет Мир!</h4>
<div>To be or not to be?</div>
</div>
<div id="d2"></div>
<script>
funMake();
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<div id="d1">
<p>Hello World!</p>
<h4>Привет Мир!</h4>
<div>To be or not to be?</div>
</div>
<div id="d2"></div>
<script>
funMake();
</script>
</body>
</html>