Helo,

I'm working with external software which is generating reports.
I'm getting table, then it is printed to website in div.
I don't have access to this table before it is generated, so i can't set any attribute before website is rendered.

So I need to add attribute to this table as last step of rendering process, it doesn't matter is it ID or Class.

Structure is like:

```
 <div class="data" id="Checklist">
     <p>Some text</p>

     <!-- There is this table -->
     <table style="...">...</table>

     <p></p> 
 </div>

```

I'm using IE v11.

I tried something like this (nothing happens):

```
  document.getElementById("Checklist").childNodes[0].className = "TestClassName";

```

Also (it gives mi error: Object doesn't support property or method 'setAttribute' )

```
 document.getElementById('news').childNodes[0].setAttribute( 'class', new_class );

```

Any other ideas?