OK, after a little more trial and error, it is as simple as:
Code:
$j("#userlink").mouseover(function() {
$j("#userinfo").slideDown(400);
$j("#userlink").focus();
}).blur(function() {
$j("#userinfo").slideUp(400);
});
However, the div won't stay open when I try to click on the input fields since the link loses focus. I tried giving the whole containing div focus, but it for some reason would not slide up when clicking elsewhere...