title: How to check if page is postback within reserved function pageLoad on ASP.NET AJAX
body: <p>I'm looking for a way to check within <code>pageLoad()</code> if this method is raised during load event because of a postback/async postback or because of being loaded and access the first time.</p>
  
  <p>This is similar to <code>Page.IsPostback</code> property within code behind page.</p>
  
  <p>TIA,
  Ricky</p>