[jQuery] preloading a div

[jQuery] preloading a div


hi
i'm new to jquery and got a problem concerning the preloading of
content.
before changing the content dynamically i want to fade it out. so i
tried this:
$("#div").fadeOut();
$("#div").load(url);
$("#div").fadeIn();
this works quite good. there is just the problem that the content
fades in immediately after fading out - there is no time for the
loading of content.
a guy in the irc-channel told me to use a callback function... but i
do not really understand :(
can anyone help me?
thanks!