//Abre un pop-up con el formulario para enviar la url
	function sendToFriend(url) {
		
		pUrl = 'enviar-pagina-amigo.php?url=' + url;
		
		w = '632';
		h = '595';
		
		isScroll = 'yes';
		
		openPopUp(pUrl, w, h, isScroll);
		
	}
	
	
	//Abre un pop-up
	function openPopUp(url, width, height, isScroll) {
	
		window.open (url, 'ventana_'+(Math.round(2000 * Math.random())), 'toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,scrollbars=' + isScroll + ',width=' + width + ',height=' + height + ',left=' + (screen.availWidth - width) / 2 + ',top=' + (screen.availHeight - height) / 2 + '');

	}