title: How to fetch data from database without submitting HTML form?
body: <p>I have an HTML form. It has select list and a text box and so on.</p>
  
  <p>What I want is, upon selecting an option, the text box must be populated with data (from a mysql database).</p>
  
  <p>What programming language do I use? If there is any example, can somebody please give me a link. I am a newbie and have learnt only PHP and MySQL.</p>
  
  <p>Thank you.</p>