停顿几秒后自动跳转，这个时候如何在页面上显示倒计时

 

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DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head >
< meta  http-equiv ="Content-Type"  content ="text/html; charset=gb2312"   />
< title > 无标题文档 title >
head >

< body  >
< SCRIPT  LANGUAGE ="JavaScript" >

script >

< SCRIPT  LANGUAGE ="JavaScript" >

script >
< FORM  NAME ="form1" >
< INPUT  TYPE ="text"  NAME ="clock"  SIZE ="2"  VALUE ="10" >  
秒后自动跳转网页
FORM >

body >
html >

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