var moving = false;
$(document).ready ( function() {
  $("#navigation > li ul").not("#current").hide();
  $("#navigation > li").mouseover( function() {
    if( moving ) return;
    moving = true;
    $("#navigation > li ul").not($(this).find("ul")).hide(80);
    $(this).find("ul").show(300, function() { moving = false; })
  });
});