function show_reply_form(comment_id) {
	document.getElementById("c"+comment_id).style.display="none";
	document.getElementById("f"+comment_id).style.display="block";
}
function hide_reply_form(comment_id) {
	document.getElementById("c"+comment_id).style.display="block";
	document.getElementById("f"+comment_id).style.display="none";
}