function getObj(name)
{
  if (document.getElementById)
  {
    return document.getElementById(name);
  }
  else if (document.all)
  {
    return document.all[name];
  }
  else if (document.layers)
  {
    return document.layers[name];
  }
  else return false;
}
var IdLelayOpen=1;
function ShowLayer(Id)
	{
	if(IdLelayOpen!=Id)
		{
		cacher('Layer'+IdLelayOpen);
		}
	IdLelayOpen=Id
	afficher('Layer'+Id);
	}

function afficher(lelay)
	{
	if(getObj(lelay))
		{
		var oLelay;
		oLelay= getObj(lelay)
		oLelay.style.display="inline";
		}
	else
		{
		setTimeout("afficher("+lelay+");",500);
		}
	}
	
function cacher(lelay)
	{
	if(getObj(lelay))
		{
		var oLelay;
		oLelay= getObj(lelay)
		oLelay.style.display="none";
		}
	else
		{
		setTimeout("cacher("+lelay+");",500);
		}
	}