function shsub(item)
{
	sd = document;
	if (sd.all['sub'+item].style.display!=null)
	{
		if (sd.all['sub'+item].style.display == "none")
		{
			sd.all['sub'+item].style.display = "";
			sd.all['img'+item].style.display = "none";
		}
		else
		{
			sd.all['sub'+item].style.display = "none";
			sd.all['img'+item].style.display = "";
		}
	}
}