function expand() {
   var t = eln('table').tBodies[1];
   if(t.style.display=='') {
      eln('exp').innerHTML = '<a href="javascript: onclick=expand();">Expand additional fields</a>';
      t.style.display='none';
   } else {
      eln('exp').innerHTML = '<a href="javascript: onclick=expand();">Hide additional fields</a>';
      t.style.display='';
   }
}

function eln(id) {
	return document.getElementsByName(id)[0];
}