var start = 0;

function resetStart() {
	// Reset 'global' start
	start = 0;
}

function ajaxGetPetitionComments() {
	start = start + 3;
	var url = base_url + 'because/ajax_petition_comments';
	var post_data = {start: start};

	$j.post(
		url,
		post_data,
		function(data) {
			if (data == "") {
				// Reload the post request, but change the start param first
				resetStart();
				ajaxGetPetitionComments();
			}
			else {
				// Update content
				$j('#comment_list').html(data);
			}
		},
		'html'
	);
}