<?php
var comment_form=document.getElementById("comment_form");
//comment_form.innerHTML="";
var newdiv=document.createElement("div");
document.getElementById(commentId).appendChild(newdiv);
newdiv.innerHTML=comment_form.innerHTML;
comment_form.parentNode.removeChild(comment_form);
newdiv.id='comment_form';
document.getElementById('comment_parent').value="0";