function post(el, replyto){
	if (replyto>0){
		txt = ' Odpovědět ';
	}
	else{
		txt = ' Vložit nový příspěvek ';
	}
	pel = el.parentNode;
    var newDIV = document.createElement('div');
	newDIV.className = 'gbreply l bggr';
	newDIV.innerHTML = '<form action="/guestbook.html" method="post"><div>'+
							'<input type="hidden" name="replyto" value="'+replyto+'">'+ 
							'<span class="bb">Jméno:</span><br>'+
							'<input type="text" name="jmeno"  class="x">'+
							'<br><br>'+
							'<span class="bb">Text:</span><br>'+
							'<textarea rows="4" name="prispevek"></textarea>'+
							'<br><br>'+
							'<div class="c"><input type="submit" value="'+txt+'"></div>'+
						'</div></form>';
	pel.appendChild(newDIV);
    el.onclick = "depost(this,"+replyto+")";
}
function depost(el, replyto){
	pel = el.parentNode;
	pel.removeChild(pel.lastChild);
	el.onclick = "post(this,"+replyto+")";
}