function cambiar_idioma(idioma) {
	var url = window.location.href;
	var q = '';
	var qpos = url.indexOf('?');

	if (qpos >= 0) {
		var q = url.substring(qpos + 1, url.length);
		var p = q.split('&');
		q = '';
		for (var i = 0; i < p.length; i++) if (p[i].substring(0,5) != 'lang=') q = q + (i > 0 ? '&' + p[i] : p[i]);
	} 
	
	q = (!q ? 'lang=' : q + '&lang=' ) + escape(idioma);
	
	window.location.href = qpos >= 0 ? url.substring(0,qpos) + '?' + q : url + '?' + q;

}


function abre_formulario() {
	window.open('formulario.php','','width=500,height=400');
}

function video(video) {
	miurl='calidad_video.php?video='+video;
	window.open(miurl,'','width=316,height=240');
}


function abreNewsletter() {
	window.open('newsletter.php', '', 'width=400, height=400');
}

function abre_newsletter() {
	abreNewsletter();
}