var isNS = false;
var isIE = false;
var isNS6 = false;
var ActiveMenu="";

if(document.all)
{
isIE=true;
}
else if(document.layers)
{
isNS=true; 
}
else if(document.getElementById)
{
isNS6=true;
}

function getObject(id)
{
	if(isNS)obj="document."+id;	
	else if(isIE) obj =id +".style";
	else if(isNS6) obj="document.getElementById('"+id +"').style";
	var object = eval(obj);
	return object;	
}


function hideIt()
{	
	if(ActiveMenu!=="")
	{	
	if(isIE) ActiveMenu.visibility ="hidden";
	else if(isNS) ActiveMenu.visibility ="hide";	
	else if(isNS6) ActiveMenu.visibility ="hidden";	
	}	
}

function showIt(id)
{	
	var object =getObject(id);	
	if ((ActiveMenu!=="")&&(ActiveMenu!==object))hideIt();
	if(isIE)
	 object.visibility ="visible";
	
	else if(isNS)
	{ 
	object.visibility ="show";
	}	
	else if(isNS6)object.visibility="visible";	
	ActiveMenu=object;
}