title: Unable to execute Selenium asynchronous script
body: <p>Why am I getting an exception with selenium 2.25.0 when trying to execute asynchronous script.</p>
  
  <pre>
  //navigate to my test page.
  
  String script = "var callback = arguments[arguments.length - 1];"  +
                  "getResult(callback)";
  
  Object result = ((JavascriptExecutor)driver).executeAsyncScript(script, "");
  
  System.out.println(result);
  </pre>
  
  <p>The test page contains the following script:</p>
  
  <pre>
  var result = true;
  function getResult(callback){
      window.setTimeout(function(){callback(true);}, 3000);
  }
  </pre>
  
  <p>This throws an exception: </p>
  
  <pre>
  FAILED: testSeleniumAsync
  org.openqa.selenium.TimeoutException: Script execution failed. Script: var callback = arguments[arguments.length - 1];getResult(callback);
   Timed out waiting for asyncrhonous script result after 2 ms (WARNING: The server did not provide any stacktrace information)
  Command duration or timeout: 11 milliseconds
  Build info: version: '2.25.0', revision: '17482', time: '2012-07-18 22:18:01'
  System info: os.name: 'Linux', os.arch: 'amd64', os.version: '3.2.0-27-generic', java.version: '1.6.0_26'
  Driver info: driver.version: RemoteWebDriver
  Session ID: 6347b507cf22b6c2d3312937a82a0a02
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
  </pre>
  
  <p>If I remove the setTimeout from my script and I call callback it works. But this is not what I want.</p>
  
  <p>Thanks.</p>