Javascripts and Windows 98

Any java guru’s out there?

I recieve script errors when going to some websites using javascipting.

Error
“object undefined line 1”

I have “jre-1_5_0_07-windows-i586-p” installed but can not get “jre-1_5_0_11-windows-i586-p” to install.

I think it’s a unregisted .dll libary file ..