function setBanner(){
	if ( getCookie('banner') ) {
		fechar();
	} else {
		document.cookie = "banner=sim";
	}
}

function getCookie ( cookieName ) {
	var results = document.cookie.match ( '(^|;) ?' + cookieName + '=([^;]*)(;|$)' );
	if ( results )
		return ( unescape ( results[2] ) );
	else
	return null;
}

setBanner();