Deleting my email account from my blackberry?

[imported_a_r]

when i first got my blackberry i added my 3 email accounts to it so that i could get my email. but i really only got the messages from one, which was like a junk mail account and sometimes the one my friends emailed me stuff. well i have recently deleted the two 'junk' accounts and now using a my more 'mature' account. i am trying to delete the two junk ones off my blackberry but i dont know how. whenever i go to log into the accounts it says i dont hvae the passwords or the usernames correct even though i think i do. is there a way to delete the 2 junk accounts that i alreayd did from my computer and use my other one as my primary accout, without actually having to log into the accont on my phone?

please help! i know it may be kind of confusing to understand what i am asking and or talking about but please try to help

thanks!!!