var abierta = "0"

//Mustra y oculta capas 	
function submenu(idCapa) {
	var capa = eval('document.getElementById("' + idCapa + '").style')
	//Oculta capa abierta
	if ((abierta != idCapa) && (abierta != "0")) {
		var capaabierta = eval('document.getElementById("' + abierta + '").style')
		capaabierta.visibility = "hidden"
		capaabierta.position = "absolute"
	}
	abierta = idCapa	
 	if (capa.visibility == "hidden") {
 		capa.visibility =  "visible"
 		capa.position = "relative"
	}
  	
 	else {
		capa.visibility = "hidden"
		capa.position = "absolute"
 	}
 
}