function showsubmenu(sid)
{
for(var i=0;i<7;i++){
	whichEl = document.getElementById("submenu"+i);
	whichFl = document.getElementById("menu"+i);
	if(i==sid){
		whichEl.style.display="block";
		whichFl.style.backgroundPosition = 'bottom';

	}else{
		whichEl.style.display="none";
		whichFl.style.backgroundPosition = 'top';
	}
}
}