/******************************************************

		funcion expMenu
		
	Expande y contrae los menus

******************************************************/
	function expMenu(capa,btn)
		{
		capa	= document.getElementById(capa);
		btn		= document.getElementById(btn);
		
		if(capa.style.display == "none")
			{
			capa.style.display = "";
			btn.src = "imagenes/ico_contrae.png";
			}
		else
			{
			capa.style.display = "none";
			btn.src = "imagenes/ico_expand.png";
			}
		}