function prev_photo () {
	var mt= $('#carPhotos').css('margin-left');
	if (mt.substring(0,1)=='-') {
		mt = -(mt.substring(1,mt.length-2));
	} else {
		mt = mt.substring(0,mt.length-2);
	}
	mt = mt+130;
	if (mt>0) {
		return;
	}
	$('#carPhotos').css('margin-left',mt+'px');
}
function next_photo () {
	var mt= $('#carPhotos').css('margin-left');
	if (mt.substring(0,1)=='-') {
		mt = -(mt.substring(1,mt.length-2));
	} else {
		mt = mt.substring(0,mt.length-2);
	}
	mt = mt-130;
	if ($('#carPhotos').width() < mt*(-2)) {
		return;
	}
	$('#carPhotos').css('margin-left',mt+'px');
}
function display_photo (img) {
	$('#mainPhoto').attr('src', img);
	$('#mainPhotoLink').attr('href', img);
}