function ecmsPrev_resize(target_obj, max_width, max_height) {
	
	if (target_obj.width > max_width || target_obj.height > max_height) {
		if (target_obj.width*max_height > target_obj.height*max_width) target_obj.width = max_width;
		else	target_obj.height = max_height;
	}
}