function showsubmenu(sid)
{
whichEl = eval("submenu" + sid);
img = eval("img" + sid);
if (whichEl.style.display == "none")
{
eval("submenu" + sid + ".style.display=\"\";");
img.src="http://www.ekotree.com/shop/statics/bclass2.gif";
}
else
{
eval("submenu" + sid + ".style.display=\"none\";");
img.src="http://www.ekotree.com/shop/statics/bclass1.gif";
}
}