function menu(what, type){
 if (parent.document.getElementById(what).style.display=='none')
  {
      parent.document.getElementById(what).style.display='block';
    if (type=='tg'){
      parent.document.getElementById(what+'_img').src='http://www.econline.edu.ru/images/main/arrow_down.gif';
    }
  }else{
      parent.document.getElementById(what).style.display='none';
    if (type=='tg'){
      parent.document.getElementById(what+'_img').src='http://www.econline.edu.ru/images/main/arrow_right.gif';
    }
  }

}

function menuT(what){
 if (parent.document.getElementById(what).style.display=='none')
  {
      parent.document.getElementById(what).style.display='block';
  }else{
      parent.document.getElementById(what).style.display='none';
  }
}