function toggle(obj_ID){
  obj=document.getElementById(obj_ID);
  if(obj.style.display=='block')
    stil='none';
  else 
   stil='block';
  obj.style.display=stil;
  set_cookie(obj_ID,stil,1)
}


function visibledivs(objID){
   obj=document.getElementById(objID);
   if(get_cookie(objID)=='block')
     obj.style.display='block';
}