title: Detect dropdown change in JSP?
body: <p>In jsp, is there any attribute to provide the information that values in the dropdown got changed?</p>
  
  <p>Say Example:</p>
  
  <p>I have dropdown country - On page load it have "US" in the dropdown and I'm changing to "UK" and then again changing to "US". In this case I have not done any change so I have nothing to save but if I click save button my page is getting submitted. Is there anyway to avoid this page submission.?</p>