<!--Меню-->
var show, hide;
function ShowMenuWait(item)
{
     clearTimeout(hide);
     show = window.setTimeout("Show(" + item.id + ")", 400);
}

function Show(ShowDiv) 
{
     ShowDiv.style.visibility = 'visible';
}
function HideMeniWait(item) 
{
     clearTimeout(show);
     hide = window.setTimeout("Hide(" + item.id + ")", 400);
}
function Hide(HideDiv) 
{
     HideDiv.style.visibility = 'hidden';
}
<!--Конец меню-->