title: How Do I Prevent "Argument not optional" error when using Javascript clearTimeout() with IE9?
body: <p>The following Javascript code works in all browsers except IE9. What's the fix?</p>
  
  <pre><code>setTimeout('doSomething();clearTimeout();',500);
  </code></pre>
  
  <p>The debugger says that it's expecting me to pass an ID number to clearTimeout(), when all I'm doing is clearing all timeouts.</p>