Get caret position in contentEditable div

Hi,

I'm finding tons of good, crossbrowser anwers on how to SET the cursor or caret position in a contentEditable DIV, but none on how to GET or find its position...

What I want to do is know the position of the caret within this div, on keyup.

So, when the user is typing text, I can at any point now its cursor's position within the div.

<div id="contentBox" contentEditable="true"></div>

$('#contentbox').keyup(function() {
// ... ?
});


(I'm cross posting at http://stackoverflow.com/questions/3...nteditable-div, because of well... frustrations :), but I will update both questions when I find an answer...)