function showsubmenu(obj,sid)
{	

	whichEl = eval("submenu" + sid);
	try{
	if (whichEl.style.display == "none")
	{
	eval("submenu" + sid + ".style.display=\"\";");
	obj.style.backgroundImage='url(cy00001/css1/sub_images/tree2.gif)';

	}
	else
	{
	eval("submenu" + sid + ".style.display=\"none\";");
	obj.style.backgroundImage='url(cy00001/css1/sub_images/tree.gif)';
	}
	}catch(e){}
}