function getArticulos(){
var uri = 'http://stage.examedia.info/lista.php';
var pars = '';
new Ajax.Updater({success: 'block_contenido_noticias'},
'/lista.php',{
	method: 'get', 
	parameters: pars, 
	onFailure: reportError
	});

}
function reportError(request)
	{
		$('block_contenido_noticias').value = "error";
	}

function loadEvent(){

new PeriodicalExecuter(getArticulos,10);


}

var ejecucion = 0;
addLoadEvent(loadEvent);