<!DOCTYPE html>
<html>
<body>
<h1>H1</h1>
<p>P1</p>
<p id="p_id">P2</p>
<span id="span_id"></span>
<script>
var bc = document.body.children;
var txt = "";
for (var i = 0; i < bc.length; i++) {
txt = txt + bc[i].tagName + "<br>";
document.getElementById("span_id").innerHTML = txt;
}
</script>
</body>
</html>
<!--
H1
P1
P2
H1
P
P
SPAN
SCRIPT
-->