title: close horizontal drop-down menu on second click
body: <p>I'm working off some code for a drop-down menu I found here on stack overflow: <a href="http://jsfiddle.net/jhoffm34/VbtuC/" rel="nofollow">http://jsfiddle.net/jhoffm34/VbtuC/</a></p>
  
  <p>I have a jquery drop-down menu that expands on click. I am trying to use document.onmousedown to get the menu to close when I click on "Categories" for a second time, but it is just reopening the menu right away. Does anyone know how to fix this?</p>