mi spiegate questo codice?

// Express Install
// Macromedia 2005(c)

System.security.allowDomain("fpdownload.macromedia .com");

// add a random number to the end of the request to avoid caching the SWF
var cacheBuster = Math.random();
var updateSWF = "http://fpdownload.macromedia.com/pub/flashplayer/update/current/swf/autoUpdater.swf?"+cacheBuster;
loaderClip.loadMovie(updateSWF);

var id = setInterval(checkLoaded, 10);
function checkLoaded()
{
if ( loaderClip.startUpdate.toString() == "[type Function]")
{
clearInterval(id);
loadComplete();
}
}

function loadComplete()
{
loaderClip.redirectURL = _root.MMredirectURL;
loaderClip.MMplayerType = _root.MMplayerType;
loaderClip.MMdoctitle = _root.MMdoctitle;
loaderClip.startUpdate();
}