So I have a drop-down menu that shows on a click, as per business requirements. The menu becomes hidden again after you mouse away from it.

But now I am being asked to have it stay in place until user clicks anywhere on the document. How can this be accomplished?

This is a simplified version of what I have now:

$(document).ready(function() {
  $("ul.opMenu li").click(function(){
   $('#MainOptSubMenu',this).css('visibility', 'visible');
  });

  $("ul.opMenu li").mouseleave(function(){
      $('#MainOptSubMenu',this).css('visibility', 'hidden');
  });
});



<ul  class="opMenu">
  <li id="footwo" class="">
    <span id="optImg" style="display: inline-block;"> <img src="http://localhost.vmsinfo.com:8002/insight/images/options-hover2.gif"/> </span>
      <ul id="MainOptSubMenu" style="visibility: hidden; top: 25px; border-top: 0px solid rgb(217, 228, 250); background-color: rgb(217, 228, 250); padding-bottom: 15px;">
        <li>some</li>
       <li>nav</li>
       <li>links</li>
       </ul>
    </li>
</ul> 

I tried something like this $('document[id!=MainOptSubMenu]').click(function() thinking it would trigger on anything that wasnt the menu, but it didnt work.