I have below code:

<ul id='someId'>

 <li class='someClass'>

 </li>

</ul>

I want to set focus on first li element within ul based on some condition.

My first attempt is like this:

var ul = document.getElementById('someId');           

var child = ul.childNodes[0];

child.focus();

My second attempt is like this :

var y = document.getElementsByClassName('someClass');

var aNode = y[0];

aNode.focus();

But none of the above works

Any ideas?