function toggleDesc(id) {
	var desc = $('camera_desc_'+id);
	var tog = $('camera_toggle_'+id);
	if (desc.style.display == 'none') {
		desc.slideDown({ duration: 0.5 });
		tog.src = '/images/buttons/arrow_expand.gif';
	} else {
		desc.slideUp({ duration: 0.5 });
		tog.src = '/images/buttons/arrow_close.gif';
	}
}