what java script are you talking about?
do you mean the Java Runtime Environment?
have you downloaded LimeWire from
http://www.limewire.com/index.jsp/download#free
did you successfully download the windows installer?
it seems that your installer is corrupt this occurs due to broken downloads.
try re downloading it.
if you still have trouble click on the WWW button below this post to download a custom-version (you need an JRE for it to run)
mahalo