Search notes:
DOM example: childElementCount
<!DOCTYPE html>
<html>
<head>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<title>childElementCount</title>
<style type="text/css">
#out {
margin-top: 20px;
background-color: #fffaf0;
}
</style>
</head>
<script type="text/javascript">
function main() {
var div = document.getElementById('theDiv');
var out = document.getElementById('out' );
out.innerHTML = 'The DIV contains ' + div.childElementCount + ' children<br>';
}
</script>
<body onload='main();'>
<div id='theDiv'>
<div>First Child
<div>First child within first child</div>
<div>Second child within first child</div>
</div>
some text
<div>Second Child</div>
<div>Third Child</div>
</div>
<div id='out'></div>
</body>
</html>