multiple drop down menu open On hover function

multiple drop down menu open On hover function

$(document).ready(function(){
$(".menu").hover(
function(){$(".sub").show(100);},
function(){$(".sub").hide(100);}
);
$("#menu").hover(
function(){$(".suba").show(100);},
function(){$(".suba").hide(100);}
);
});
In above mention code problem is that second hover function is not working
with properly please tell me if any issue in it.