<!DOCTYPE HTMLPUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html><head><title>Page with slow loading iFrames</title></head><body><!-- Takes 3 seconds to load --><iframesrc="/common/sleep?time=3"></iframe><!-- Important: do not add a src attribute! --><iframeid="noSrc"></iframe></body></html>