I'm new to jQuery but pretty familiar with JavaScript. I would like to convert the code below to a function that can be used like "$("#member-feedback li").rotateElements()". I've looked at some examples, but I'm not sure where to start. Thanks for your help.

1. var els = [];
2. var idx = 0;
3. var num = 0;
4. function rotateElements() {
5.     els.eq(idx).hide();
6.     idx++;
7.     if(idx >= num) { idx = 0; }
8.     els.eq(idx).fadeIn('slow');
9. }
10. $(function() {
11.     els = $('#member-feedback li');
12.     num = els.length;
13.     idx = Math.floor(Math.random() * num)
14.     els.eq(idx).show();
15.     setInterval('rotateElements()', 7000);
16. });