function add_comment(i, heading) {
	heading = (heading.length>25)? heading.substring(0,22)+"..." : heading;
	document.getElementById('comment_heading').innerHTML = "<strong>Comment on <em>'"+heading+"'</em></strong>";
	document.getElementById('author').value = "";
	document.getElementById('comment').value = "";
	document.getElementById('blog_id').value = i;
	document.getElementById('comment_container').style.display = "block";
}

function cancel_comment() {
	document.getElementById('author').value = "";
	document.getElementById('comment').value = "";
	document.getElementById('blog_id').value = "";
	document.getElementById('comment_container').style.display = "none";
}

function max_length(o, i) {
	o.value = (o.value.length>i)? o.value.substring(0,i) : o.value;
}