function showsubmenu(sid)
{
//imgmenu = eval("imgmenu" + sid);
//whichEl = eval("submenu" + sid);
whichEl = document.getElementById("submenu" + sid); 
imgmenu = document.getElementById("imgmenu" + sid); 
if (whichEl.style.display == "none")
{
whichEl.style.display="";
imgmenu.style.background="url(images/dh_down.gif)";
}
else
{
whichEl.style.display="none";
imgmenu.style.background="url(images/dh_up.gif)";
}
}