[jQuery] How to close dropdown

[jQuery] How to close dropdown


Hi,
I am trying to create a simple dropdown.
The problem I have is that I do not know how to close the dropdown.
It is supposed to close when user clicks on id="btn" or anywhere
outside of dropdown.
That's what I tried but close does not work.
<html>
<body>
    <div id="wrapper">
        <div id="btn">Open Menu</div>
        <div id="some_menu" style="display:none">Some Menu</div>
    </div>
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery('#btn').click( function(){
        jQuery('#some_menu').show();
    });
jQuery('body').click( function(){
        var $some_menu = jQuery('#some_menu');
        if($some_menu.is(':visible')){
            $some_menu.hide();
        }
    });
});
</script>
</body>
</html>