title: Page.ClientScript.RegisterStartupScript doesn't work - why?
body: <p>i have some code in OnInit hanlder</p>
  
  <pre><code>if (!Page.ClientScript.IsStartupScriptRegistered(GetType(), "MyScript"))
  {
      Page.ClientScript.RegisterStartupScript(GetType(), "MyScript", GetStartupScript(), true);
  }
  </code></pre>
  
  <p>here i try to register some java script code. and i want it to work on button click event. but it doesn't execute. it executes only after refreshing page. can anyone explain me why it doesn't execute?</p>
  
  <p>thnx in advance!</p>