How do i change the email my runescape account is registered to?

I keep getting hacked by the same guy.How do i change the email my runescape account is registered to?
http://www.runescape.com/p=kKmok3kJqOeN6鈥?/a>



Bottom left-hand corner says ';E-mail management'; for adding or changing your account's email address.How do i change the email my runescape account is registered to?
runescape sucks
if u keep getting hacked then use recovery questions and a good long password



in account Management the is a change e-mail setting option