function showHide(id)
{
	if (document.getElementById(id).style.display == 'none')
	{
		document.getElementById(id).style.display = 'block';
	}
	else if (document.getElementById(id).style.display == 'block')
	{
		document.getElementById(id).style.display = 'none';
	}
}

function hideIt(object) 
{
   object.style.display="none";
}

function showIt(object) 
{
   object.style.display="block";
}

var activeMenu = null;

function popMenu(m) 
{
   hideMenu();
   activeMenu = document.getElementById(m);
   showIt(activeMenu);
}

function hideMenu() 
{
   if (activeMenu != null) 
   {
      hideIt(activeMenu);
      activeMenu = null;
   }
}