var timerId;
var videoId;
function slideStart(id) {
	videoId = id;
	slideChange();
	timerId = setInterval('slideChange()', 500);
}
function slideStop() {
	clearInterval(timerId);
}
function slideChange() {
	var url = $('#'+videoId).attr('src');
	url = url.replace(/thumbnail_\d+\.jpg/, 'animation_00000.jpg');
	var match = url.match(/(\d{5})\.jpg/i);
	var num = parseInt(match[1].replace(/^0+/, ''));
	if (parseInt($('#'+videoId).attr('count')) > num) {
		num++;
	} else {
		num = 1;
	}
	num = ('0000' + num).slice(-5);
	url = url.replace(/\d{5}\.jpg/, num + '.jpg');
	$('#'+videoId).attr('src', url);
}