function Diaporama(nbmax,ident)
	{
		for (diap=1;diap<=nbmax;diap++)
		{
			if (diap!=ident)
				{
				document.getElementById("description"+diap).style.display="none";
				document.getElementById("realisation"+diap).style.display="none";
				}
			else {
				document.getElementById("description"+diap).style.display="block";
				document.getElementById("realisation"+diap).style.display="block";
				} 
		}
	}