Child nodes in a node
<html> <head> <title>Test</title> </head> <body> <ul id="ul_o"> <li>v1</li> <li>v2</li> <li>v3</li> </ul> <script type='text/javascript'> document.onreadystatechange = function () { if (document.readyState === "interactive") { document.body.innerHTML = '<h4><code>ul</code> with <i>ul_o</i> has '+document.getElementById("ul_o").getElementsByTagName("li").length +' <code>li</code> Tags</h4>'; } } </script> </body> </html>
Source: stackoverflow.com