Fetch only one record in MySql

Question

Hi Friends

I have a table in mysql like this

id   fname   lname

=============

1     amit      gupta

2     sumit     rai

3      raj        kohli

4     kunal    sharma

5      sonu    saini

and I have a textbox and a ok button in html form. I want, when we enter 3(id) in the textbox then click ok button then display only data of id 3 i.e. raj kohli. How to do this ? Please help me anyone with an example ?

Thanks