help with fade in an fade out

[janus]

I'm brand new to mootools and was wondering if anyone can help with a
simple function to fade the current content out and then fade in new
content.

1)fade out current content
2)get newcontent
3)fade in newcontent

I had prevoiusly build this in jquery but would like to move to
mootools. here is the current code of the function in Jquery:-

function newcontent(newcontent)
{
        $(divname).fadeOut("fast",function(){
                $(this).html(newcontent);
                $(this).fadeIn(1500);
                        })
}
this function accepts a variable from another function (newcontent),
fades out the current page content and then fades in the new content.

in mootools  to just display the content use:-

$(divname).set('html', newcontent);

and this works fine, but i would like to add the fade effects again. I
think this has something to do with chains but I not sure how to go
about implementing this.

if anyone could point me in the right direction, that would be great

cheers

Janus