function dispMoreComment(story_id){
	//alert('more_comment-' + story_id);
	m=document.getElementsByClassName('more_comment-' + story_id);
	for (i=0; i<m.length; i++){
		Element.toggle(m[i]);
	}
	m=$('comment_chainR-' + story_id);
	classname=m.getAttribute('class');
	if (classname){
		if (classname.indexOf('1')>0){
			m.setAttribute('class', classname.replace('1', '2'));
		}else{
			m.setAttribute('class', classname.replace('2', '1'));
		}
	}
	
	m=$('comment_chainL-' + story_id);
	classname=m.getAttribute('class');
	if (classname){
		if (classname.indexOf('1')>0){
			m.setAttribute('class', classname.replace('1', '2'));
		}else{
			m.setAttribute('class', classname.replace('2', '1'));
		}
	}
	//m.setAttribute('class','overlay');

	/*
	if (Element.removeClassName(m, '){
		alert(Element.getClass('comment_chain-' + story_id));
	}
	*/
}