title: How to get id of controls within UpdatePanel in asp.net
body: <p>As I'm new in asp.net development and this could be a silly question but I'm asking this question here.</p>
  
  <p>Id of controls like button, textbox in update panel is not visible in client side debugger
  and if I write document.getelementbyid it gives me null value of the id of controls within updatePanel.</p>
  
  <p>Actually My requirement is I want to write some javascript functions and in those functions I want to use the ids of controls. </p>
  
  <p>So please guide me.</p>
  
  <p>Regards,
  Vivek</p>