I want to insert a bar into the first frame of my Flash website that displays the loading progress. I created a bar, used a shape tween on it and then added the following actionship to the movie clip, which is called 'bar_mc':

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stop();
bar_mc.onEnterFrame=function(){
this.gotoAndPlay(Math.round((_root.getBytesLoaded( )/_root.getBytesTotal())*100));
if(_root.getBytesLoaded()==_root.getBytesTotal()){
play();
}
};

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For some reason when I test the flash file offline it reports 2 errors and the bar repeatedly fills up. Is there something I need to add to the above code? I got it from a web designer magazine.