function line_highlight(obj, on, off){
  var line = obj.parentNode;
  if(!on)
   on = 'highlight';
  if(!off)
   off = 'cc';   
  line.className = line.className == on ? off : on;
 }
 
 function line_highlight1(obj, on, off){
  var line = obj.parentNode;
  if(!on)
   on = 'highlight1';
  if(!off)
   off = 'cc1';   
  line.className = line.className == on ? off : on;
 }