function get_swf_obj(idName) {
    if (navigator.appName.indexOf("Microsoft") != -1) {
        return window[idName];
    }
    else {
        return document[idName];
    }
}

function ext_request_banner() {
	var url = "http://www.mynetworktv.com/player/banners/29099_728x90.jpg";
	var type = "jpg";
	var clickthru = null;
	var refresh_time = 0; // seconds
	// parameters-
	// type: only tested value is 'swf' (upper- or lower-case).  All other values are assumed to be static bitmaps
	// clickthru: pass null for swfs (it gets ignored anyway, so any value will work)
	// refresh_time: time in seconds for interface to request a new banner.  Use 0 to prevent refreshes
	get_swf_obj("video_player").fl_load_banner(url, type, clickthru, refresh_time);
}