function setImage(context, url) {
	$('photo-content').src = url;
	var i = 0, el;
	while(el = $('photo-content-thumb-'+i)) {
		el.className = '';
		i++;
	}
	context.className = 'selected';
}
function setImageDescription(id) {
	var head = $('image_title_'+id) ? $('image_title_'+id).innerHTML : '';
	var desc = $('image_description_'+id) ? $('image_description_'+id).innerHTML : '';
	$('big_image_title').innerHTML = head;
	$('big_image_description').innerHTML = desc;
}