if (typeof bg_color == 'undefined') {
  bg_color = 'FFFFFF';
}

$panel = '<iframe src="http://www.araklihaber.net/haber_servis/?width='+news_width+'&height='+news_height+'&bg_color='+bg_color+'" width="'+news_width+'" height="'+news_height+'" frameborder="0" scrolling="no"> </iframe>';

document.write( $panel);