function toggle_visibility(id, h4id) {
   var e = document.getElementById(id);
   var h = document.getElementById(h4id);
   if(e.style.display == 'block') {
		h.style.padding = '0 0 0 20px';
		h.style.background = 'transparent url(/images/plus.png) no-repeat top left'; 
		e.style.display = 'none';
		}
   else {
	  e.style.display = 'block';
	  h.style.padding = '0 0 0 20px';
	  h.style.background = 'transparent url(/images/minus.png) no-repeat top left';
	  }
	}