function imagen_directo (){
                a = new Ajax();
		var cadena = "modulo%3DPLY%26params%3Dposicion%253DPORTADA";
		var ap = unescape(cadena.split("&")[0]);
                a.replace("/modulo/index.html",ap,"","imagen_directo","GET", behaviour_apply);
		return false;
}
setInterval("imagen_directo()",300000);