title: How to use external js file in ScriptManager.RegisterStartupScript?
body: <p>i have a control which is on update panel. i want my javascript code run every time the updatePAnel is updated. </p>
  
  <p>i use something like this:</p>
  
  <pre><code>ScriptManager.RegisterStartupScript(this, GetType(), "my_script", "runFunction();", true);
  </code></pre>
  
  <p>the problem is that my js code is huge and i want to place it in js file and use it from file. what should i change in my code ? </p>