TD and TR tags Options

[sassypersian99]

I can read HTML/CSS well, but unfortunately ive been b.s[ing] my way through these tags. td and tr. i have no idea what they mean...i mean, its for table cells...row...etc. etc. but i'm not sure the proper way to manipulate it. For example, if i wanted to override a default myspace layout or something, i would be incapable. So if someone could explain this to me, that would b great.

----2nd thought----
it gets confusing for me when i have like...this...

CODE

<style type="text/css">
table td table tr td.text table {visibility:hidden;}
table td table tr td.text table table, table td table tr td.text table table td.text {visibility:visible;}
</style>

what does it all mean, and how do i know what table it is speaking of?


thanks.