function showsubmenu(sid,num)
{
whichEl = eval("submenu" + sid);
for (i=1;i<=num;i++){ 
	if(i!=sid){
	which = eval("submenu" + i);
	which.style.display="none";
	}
}
if (whichEl.style.display == "none")
{
eval("submenu" + sid + ".style.display=\"\";");
}
else
{
eval("submenu" + sid + ".style.display=\"none\";");
}
}