Where does mozilla build a table of attribute for each node

Hi,

Let's say I have the following node in my source html:

<EMBED width="480" height="395"
       flashvars="video_id=EjxqENnZ8Lo&amp;l=313&amp;sk=hBFXQnDzm7k-
X1HlXyntXgC&amp;t=OEgsToPDskKqJoN978wzNEVea_KDT60n&amp;plid=AAREz5WX_YI5jEQgAAAA5QBIQAw&amp;tk=O20KOeiaGDgilZJcZwBmFCZfxUX2Gb3YuSSVC5UerAggEBTVOE9y-
Q==&amp;ad_tag=http://n4061ad.doubleclick.net/pfadx/
com.ytpwatch.newsandpolitics/main_659;sz=480x70;!
c=659;kvid=EjxqENnZ8Lo;kpu=MelissaJenna;ko=y;kpid=659;kr=F;u=EjxqENnZ8Lo|
659|123C6A10D9D9F0BA;&amp;playnext=0"
       allowfullscreen="true" quality="high" bgcolor="#FFFFFF"
name="movie_player"
       id="movie_player" style="" src="/player_dcad.swf"
type="application/x-shockwave-flash"/>


Can you please tell me where does mozilla build a talbe of attributes
for the embed tag?

Thank you.