function expand_contract(which, tht) {
   var todo = document.getElementById(which);
   var imge = document.getElementById(tht);
   var state = todo.style.display;
   var imgstate = imge.src;
   if ( state == 'block' ) {
	  imge.src = "/images/chiclets/closed.gif";
	  todo.style.display = 'none';
   }
   else {
	  imge.src = "/images/chiclets/open.gif";
	  todo.style.display = 'block';

   }
   
}