Can't open javascript folder on web

[Reppie]

I have a website, wich uses a folder 'javascript' with in there some javascripts.
If i browse to my website and try to access those javascript files in there, i always get a 404.

If i rename the folder 'javascript' to 'script' or something else, i CAN access those files... It seems that the folder 'javascript' gets somewhere blocked, tho i cant find anything in my htaccess or in the IPSConfig3 settings....

Ofcourse, the solution is easy... i just rename the folder 'javascript'.... tho i'm still curious what causes this problem