In an absolute sense, unc is right. You can always get section 1 of JAR documents on their website, but not the other sections. However, currently on the CAA website is the vast majority of JAR FCL 2, including the recent Amendment 3, which seems to be the one the CAA are using:
http://www.caa.co.uk/default.aspx?ca...pe=68&gid=1208
Enjoy!