new in blogging... question?

hay.... for whatever reason, i can't seem to add a page element. i searched the help blog and ok it mentioned that i should check whether my URL has the "2" after www, which in my case doesn't have, then an update was sent that if its still not working, it says that "please ensure that you put all JavaScript into JavaScript page elements, instead of directly into your template code". oh my gulay!! i thought i'm not technology/internet illiterate pero i really cannot get what this instruction is asking me to do. whew!!