function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }
		    function toggle_menu(id) {
       var f = document.getElementById(id);
       if(f.style.backgroundImage == 'url(http://images.ctv.ca/v2/images/buttons/minus.gif)')
          f.style.backgroundImage = 'url(http://images.ctv.ca/v2/images/buttons/plus.gif)';
       else
          f.style.backgroundImage = 'url(http://images.ctv.ca/v2/images/buttons/minus.gif)';
    }

		    function toggle_menu_corp(id) {
       var f = document.getElementById(id);
       if(f.style.backgroundImage == 'url(http://images.ctv.ca/v2/images/buttons/minus.gif)')
          f.style.backgroundImage = 'url(http://images.ctv.ca/v2/images/buttons/plus1.gif)';
       else
          f.style.backgroundImage = 'url(http://images.ctv.ca/v2/images/buttons/minus.gif)';
    }