Modal disappears on hover?

Question

JavaScript

There is a modal window that appears when you hover over a menu item.
So sometimes (not always) when you click inside the modal window - it disappears.
.menu_profile - menu item
#modal_user - modal window

$('.menu_profile, #modal_user').hover(
function(){
$('#modal_user').css('display', 'block');
$('#modal_user').offset({top:$ ('.menu_profile').offset().top+39,left:$('.menu_profile').offset().left})
},
function(){
$('#modal_user').css('display ', 'none');
}
);