function toggleNext(el) {
 var next=el.nextSibling;
 while(next.nodeType != 1) next=next.nextSibling;
 next.style.display=((next.style.display=="none") ? "block" : "none");
}

function toggleNextById(el) {
 var ccn="clicker";
 var clicker=document.getElementById(el);
 clicker.className+=" "+ccn;
 clicker.onclick=function() {toggleNext(this)}
 toggleNext(clicker);
}