function idiomas(tipo){
	var url = window.location.href;
	if (tipo!='es'){
		var finCadena = url.indexOf("?",0);
		var urlFinal = url.substring(0,finCadena) + "?leng=" + tipo;
	} else {
		var finCadena = url.indexOf(".php",0);
		var urlFinal = url.substring(0,finCadena) + ".php";
	}
	document.location.href = urlFinal;
}