function toggleSpoiler(el,s,h){
    el.className = el.className == 'sp-head-folded' ? 'sp-head-unfolded' : 'sp-head-folded';
    var e=el.parentNode.parentNode.getElementsByTagName('div')[2];
    if (e.style.display=='none'){e.style.display='block';if(h!='')el.innerHTML=h;}
    else{e.style.display = 'none';if(s!='')el.innerHTML = s;}
}