function mouse_over_a (target_id) {
  if (document.layers) {
    var my_target = target_id + 'txt';
    var linkobj = eval('document.'+my_target);
    if (linkobj) linkobj.visibility='visible';
  }
  if (document.getElementById) {
    var linkobj = document.getElementById(target_id);
    if (linkobj)  linkobj.style.color = 'green';

    var my_target = target_id + 'txt';
    linkobj = document.getElementById(my_target);
    if (linkobj) linkobj.style.display='inline';
  }

  if (tg_svgdoc) {
    var svgobj = tg_svgdoc.getElementById(target_id); 
    if (svgobj != null) {
      svgobj.setAttribute("style", "opacity:0.4"); }
  }

// Propagate the event to other handlers. 
  return true; 
}

function mouse_out_a (target_id) {
  if (document.layers) {
    var my_target = target_id + 'txt';
    var linkobj = eval('document.'+my_target);
    if (linkobj) linkobj.visibility='hidden';
  }

  if (document.getElementById) {
    var linkobj = document.getElementById(target_id);
    if (linkobj) linkobj.style.color = ''; 

    var my_target = target_id+'txt';
    linkobj = document.getElementById(my_target);
    if (linkobj) linkobj.style.display='none';
  }

  if (tg_svgdoc) {
    var svgobj = tg_svgdoc.getElementById(target_id); 
    if (svgobj != null)  {
      svgobj.setAttribute("style", "opacity:0"); }
   }

// Propagate the event to other handlers.
  return true; 
}