function togglelist(num) {
  var imgObj = eval('document.lstmarker'+num);
  if (document.getElementById('lstcontainer'+num).style.display=='')
 {
   document.getElementById('lstcontainer'+num).style.display='none';
   imgObj.src="img/h.gif";
 }
 else
 {
   document.getElementById('lstcontainer'+num).style.display='';
   imgObj.src="img/s.gif";
 }
}