function showhide(obj)
{
	
	noeuds = obj.nextSibling;
	while (noeuds.tagName != "H6" && noeuds.tagName != "H5") {
		if (noeuds.tagName == "SPAN")
		{
	  		noeuds.style.display=(noeuds.style.display=="block")?"none":"block";
		}
		noeuds = noeuds.nextSibling;
	}
	
}