Seems simple to download jquery but I get an error - I choose OPEN and the RUN - I immediately get an error

 

c:u...internet filescontent.ie5xA3JQKjquery-1.4.2[1].js

Line 16 Char 1

Error 'window' is undefined

code 800A1391

Microsoft jscript runtime error

 

doesn't matter which release I choose or which jquery - I can't download