<html><head><script type="text/javascript">function timedText(){var t1=setTimeout("document.getElementById('txt').value='2 seconds!'",2000)var t2=setTimeout("document.getElementById('txt').value='4 seconds!'",4000)var t3=setTimeout("document.getElementById('txt').value='6 seconds!'",6000)}</script></head><body><form><input type="button" value="显示计时的文本！" onClick="timedText()"><input type="text" id="txt"></form><p>在按钮上面点击。输入框会显示出已经流逝的 2、4、6 秒钟。</p></body></html>