Coordinate conversion calculator

[big man]

I know this might be a stupid question, but I wan't to know if any of you know of any sites that convert between RA and dec coordinates to altitude and azimuth coordinates. I mean I found this site:

http://home.att.net/~srschmitt/script_celestial2horizon.html

But unfortunately you can't enter in any time you want...it simply gets the time that you are visiting the site.

I was hoping someone might have come across some site that does this. I mean it would just save me having to figure out how to slightly alter the source code.
Javascript, or any programming for that matter, is not a strong point for me so it just takes me much longer than the average person to work out the programming.

If anyone could help out that would be great. I really just want it so that I can have it as a link for my web page project for one of my classes. If I don't have it I guess it's no big problem though.

Anyway thanks

 

[neutrino]

http://wise-obs.tau.ac.il/~eran/Wise/Util/Horizontal_Coordinates.html
http://www.astro.utu.fi/EGal/CooC/CooC2.html
http://www.frostydrew.org/observatory/utilities.htm (scroll to the bottom of the page)

 

[big man]

Neutrino thank you so much.

You've helped me a lot recently :)

Cheers