// Don't just write solid code; write happy code :)
$(document).ready(function() {
$("li.hassub").children("ul").hide();
$("li.hassub").mouseover(function() {
    var e = $(this);
    myTimer = setTimeout(function() {
        e.children("ul").slideDown("fast").parent().siblings().children("ul").slideUp("fast");
    }, 100);
}).mouseout(function() {
    if (myTimer) clearTimeout(myTimer);
})});