Change Text On An Object?

I have an object- or whatever it's called- with the number 10 on it. The code looks something like

Code:

<div id="tile10" style="left:200px; top:300px" onclick="move(10)">
10
</div>

How would I change that number 10 to a random number between 1 and 8 from a function called initialize? I know I could randomize the number like:

Code:

var x = Math.ceil(Math.random() * 8);

However, I'm not sure how I would change the text in tile10 to that random number.