function hideMenu(obj){

	if(document.getElementById){
		document.getElementById(obj).style.visibility="hidden";
		return;
	}
	
	if(document.all){
		document.all[obj].style.visibility="hidden";
		return;
	}
	
	if(document.layers){
		document.layers[obj].visibility="hidden";
		return;
	}
	
}


function showMenu(obj){

	if(document.getElementById){
		document.getElementById(obj).style.visibility="visible";
		return;
	}
	
	if(document.all){
		document.all[obj].style.visibility="visible";
		return;
	}
	
	if(document.layers){
		document.layers[obj].visibility="visible";
		return;
	}
	
}