时间倒计时

 

<form id="form1" name="form1" method="post" action="">

 时间倒计时：
   <input type="submit" name="Submit" value="同意" />

</form>

 <script language="javascript">

document.form1.Submit.disabled = true;

var speed = 1000; //速度

var wait = 10; //停留时间

function updateinfo(){

  if(wait == 0){

    document.form1.Submit.value = "我同意";

    document.form1.Submit.disabled = false;

  }

  else{

    document.form1.Submit.value = "阅读条款"+wait;

    wait--;

    window.setTimeout("updateinfo()",speed);

  }

}