Checking the domain name is already registered or not

Dear Ranchers,
I'm doing a project in JSP for a domain spacing company. They want their clients to check the domain name they have to register is already registered or not. Please help me how can i do this in JSP page

the form design is

text box : enter the domain name
check availability

for egs : if they type www.javaranch.com it has to check and bring it is already available.

Please help me how can i do this

Thanks in advance

regards

Aravind Prasad

Cant they use the internic service ?

There is nothing specific in JSP for doing this.

Moving to Sockets and Other Internet Protocols.

Originally posted by John Meyers:
Cant they use the internic service ?

Sending your customers to other web sites (internic uses Verisign to query .com and .net TLD's) is not a good business model.
Perhaps you could exec an nslookup on the requested domain. If it comes back with a negative result, the domain should be available.
There can be issues since there is a delay of several hours between a domain being registered and that registration being propogated through the DNS. I'm not sure how to handle that.