function getArticulos(){

var pars = '';
new Ajax.Updater({success: 'lista_articulos'},
'http://www.examedia.info/noticias.php',{
	method: 'get', 
	parameters: pars, 
	onFailure: reportError
	});

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

function loadEvent(){
new PeriodicalExecuter(getArticulos,20);


}


addLoadEvent(loadEvent);