varde,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.menuska {
display: none;
}
.active{
display: block;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(function() {
$(document).click(function(event) {
var a = $(".menuska");
$(event.target).is(".menu") ? a.toggleClass("active") : a.removeClass("active")
})
});
</script>
</head>
<body>
<div class="menu">menu</div>
<div class="menuska">menuska</div>
</body>
</html>