How can I tell if a domain name is free or not?

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How can I tell if a domain name is free or not?

multimediocrity

I would like to put an application on my web page so users can type in a web address and know whether or not it is free. How do I build this, or where can I get a prebuilt script?

Thanks!
- Multi

Declan1991

Whois?

multimediocrity

Thanks, but I'm looking for an application that I can add to my site so people can look up domains from MY site. Does domaintools have the script somewhere?

astupidname

Is this what you are looking for? :
http://www.pcnames.com/webmaster/

multimediocrity

Yes! Thanks a lot! This is good enough and will suffice for my purposes.
Do you know of any others? Is there any way I could generate my own code?

A1ien51

If you could code your own, it is not going to be done with JavaScript, ould require a serverside language.

Eric

multimediocrity

That's true. I mistakenly added it to the JS thread, not PHP. I'll post it over there.

Thanks!