title: How to use an asp.net web service for refreshing only small part of asp.net 4.0 web page without editing any other part
body: <p>I know how to write a web-service but until now I used them with always ready scripts. What I want to do this time is, have a web-service will return a string and I want to display this string in a part of webpage. That part may be inside an update panel or not. I know how to use jquery. So my question is how do I call a web-service every 5 seconds and update a part of webpage with the result of web-service. This update should not interrupt any part of the page and never cause post-back.</p>
  
  <p>How can I do that?</p>
  
  <p>asp.net 4.0 , c# 4.0</p>