/* Show/Hide a href Toggle 

<a href="#" onclick="toggle_visibility('foo');">Click here to toggle visibility of element #foo</a>
<div id="foo">This is foo</div>

*/

   

  
      function toggle(obj) {
   
      var el = document.getElementById(obj);
   
      el.style.display = (el.style.display != 'none' ? 'none' : '' );
   
      }