How to detect when innerHTML is complete

I've done quite a bit of searching for a solution to this problem but so far haven't found one that works cross browser.

What I need is a raw javascript function which will take an element and run a callback once the innerHTML has successfully been inserted into the dom.

e.g.

    var element = document.getElementById('example');
        element.innerHTML = newhtml;

    waitUntilReady(element, function(){
            //do stuff here...
    });

So just to summarize, I need to be able to check the contents of the element and fire a callback when innerHTML has completed.

Thanks in advance for any help.