Element.extend({
	show: function(){ this.setStyle('display','block');},
	hide: function(){ this.setStyle('display','none');},
	change: function(){ 
		if (this.getStyle('display')=='block') {
			this.setStyle('display','none');
			$('mostrar-ocultar').innerHTML=js_p_mostrar;
		} 
		else {
			this.setStyle('display','block');
			$('mostrar-ocultar').innerHTML=js_p_ocultar;
		}}
});

var desde_cal,hasta_cal;  

window.addEvent('domready',function() {
	desde_cal  = new Epoch('epoch_popup','popup',document.getElementById('desde-calendar'),document.getElementById('desde-fecha'));
	hasta_cal  = new Epoch('epoch_popup','popup',document.getElementById('hasta-calendar'),document.getElementById('hasta-fecha'));
	$('noticias-anteriores').hide();
});