[jQuery] Javascript question: Get elementid inside an element

[Mark]

Hey,

For example take this code:

<div id="001">
    <div id="0010">
   </div>
    <div id="0011">
   </div>
</div>

Now i want to have the InnerHtml of id 0011
one way to do that is: document.getelementbyid('0011');

But that id COULD be in more places.. (i know it`s not good for id`s.. but
in some cases it`s possible)

So how do i get the id: 0011 without the document thing?
i tried this:

var test = document.getelementbyid('001');
alert(test.getelementbyid(0011).InnerHtml);

but that isn`t working.

I hope someone could help me with this. (above code is not tested)

Thanx in favor,
Mark